1. After two cubes are combined into a cuboid, the surface area is reduced by 162cm & sup2? 2. The two cars run towards each other from two places 594km apart, and meet 4.5 hours later. The speed of car a is 1.2 times that of car B. calculate the speed of the two cars Fill in the blanks: The surface area of a cuboid made of 4 pieces of wood with 2 cm edge length is the most reduced____ cm². 2. A cuboid with a height of 10 cm is a cuboid with a circumference of 20 cm at the bottom. The volume of this cuboid is____ CM & sup3;, the surface area is____ cm². 3. From a cuboid, a cuboid with a length of 3cm is cut, and the remaining cuboid with a volume of 45cm & sup3; is cut____ cm.

1. After two cubes are combined into a cuboid, the surface area is reduced by 162cm & sup2? 2. The two cars run towards each other from two places 594km apart, and meet 4.5 hours later. The speed of car a is 1.2 times that of car B. calculate the speed of the two cars Fill in the blanks: The surface area of a cuboid made of 4 pieces of wood with 2 cm edge length is the most reduced____ cm². 2. A cuboid with a height of 10 cm is a cuboid with a circumference of 20 cm at the bottom. The volume of this cuboid is____ CM & sup3;, the surface area is____ cm². 3. From a cuboid, a cuboid with a length of 3cm is cut, and the remaining cuboid with a volume of 45cm & sup3; is cut____ cm.

one
After the two cubes are combined into a cuboid, the area of the two bottom surfaces is reduced,
So the area of each bottom is: 162 / 2 = 81 square centimeter
So the side length is 9 cm
The volume of cuboid is 9 × 9 × (9 × 2) = 1458 cubic centimeter
two
Two cars travel 594 △ 4.5 = 132 km per hour
Therefore, the speed of car B is 132 (1 + 1.2) = 60 km / h
The speed of car a is 60 × 1.2 = 72 km / h
Fill in the blanks:
The surface area of a cuboid made of 4 pieces of wood with 2 cm edge length is the most reduced__ 32__ cm².
It can reduce up to 8 surfaces, 2 * 2 * 8 = 32 square centimeters
2. A cuboid with a height of 10 cm is a cuboid with a circumference of 20 cm at the bottom. The volume of this cuboid is_ 250___ CM & sup3;, the surface area is_ 250___ cm².
Bottom side length: 20 / 4 = 5cm
Volume: 5 × 5 × 10 = 250 CC
The surface area is: 20 × 10 + 5 × 5 × 2 = 250 square centimeter
3. From a cuboid, a cuboid with a length of 3cm is cut, and the remaining cuboid with a volume of 45cm & sup3; is cut_ 8___ cm.
The length of the bottom side of the remaining cuboid is 3cm
The bottom area is 3 × 3 = 9 cm
The length of the cuboid is 45 / 9 = 5 cm
The length of the original cuboid is 5 + 3 = 8 cm

5 years old six application questions speed. 1!
1. 42 students in class 1 of grade 5 take graduation group photos and take 6-inch group photos. Two photos can be attached, and the cost is 5.20 yuan. If you need to print each photo, you will be charged 0.71 yuan. Now each student has one photo. How much will each person pay?
2. When students take photos during the spring outing, they use the film that can take 36 negatives. A roll of film costs 21 yuan. The development fee is 4.2 yuan. Each photo is 0.8 yuan. How much is the average per photo?
3. Wu Min's final examination results are as follows: the average score of Chinese and mathematics is 94 points. The average score of mathematics and English is 88 points. The average score of English and Chinese is 86 points. How many points do Xiao Ming get for Chinese, mathematics and English
4. The average age of a and B is 12 years old, B and C are 20 years old, C and a are 16 years old. What are the ages of the three?
5. The three factories of a, B and C each invested the same amount of money to buy a number of cars. After the purchase, the demand of factory C was less. As a result, factory C needed 15 cars less than factory a and factory B. factory a and factory B each paid factory C 550000 yuan. What's the price of each car?
6. Party A, Party B and Party C buy 8 loaves of bread together / share them equally / Party A pays for 5 loaves of bread / Party B pays for 3 loaves of bread. Party C doesn't have any money with him. After eating, Party C should take out 4 yuan and 80 cents. How much should Party C give to Party A and Party B

1.
You need 42 photos,
In addition to the 2 pieces, you need to wash them: 42-2 = 40 pieces
Total cost: 40 × 0.71 + 5.20 = 33.6 yuan
Average per person: 33.6 △ 42 = 0.8 yuan
two
Total cost: 0.8 × 36 + 21 + 4.2 = 54 yuan
three
Chinese and Mathematics: 94 × 2 = 188 points
Mathematics and English: 88 × 2 = 176 points
English and Chinese: 86 × 2 = 172 points
All added up, Chinese, mathematics, English each added 2 times
Total score of three courses: (188 + 176 + 172) △ 2 = 268
Language: 268-176 = 92 points
Mathematics: 268-172 = 96 points
English: 268-188 = 80 points
four
Party A and Party B: 12 × 2 = 24 years old
B and C: 20 × 2 = 40 years old
A and C: 16 × 2 = 32 years old
A, B and C: (24 + 40 + 32) △ 2 = 53 years old
A: 53-40 = 13 years old
B: 53-32 = 21 years old
C: 53-24 = 29 years old
five
Party A and Party B need 15 × 2 = 30 more than Party C
These 30 cars are equally divided among the three factories, and each factory: 30 △ 3 = 10 cars
Party A and Party B each ask for more: 15-10 = 5
Each vehicle: 55 △ 5 = 110000
six
Average per person: 8 △ 3 = 8 / 3 bread
Average bread: 4.8 △ 8 / 3 = 1.8 yuan
A overpaid: 5-8 / 3 = 7 / 3
Due: 1.8 × 7 / 3 = 4.2 yuan
B overpaid: 3-8 / 3 = 1 / 3
Due: 1.8 × 1 / 3 = 0.6 yuan

Xiao Ming's money is four times of Xiao Fang's, Xiao Ming spent 60 yuan, Xiao Fang spent 16 yuan, and Xiao Ming's remaining money is five times of Xiao Fang's?
Xiao Ming's money is four times of Xiao Fang's, Xiao Ming spent 60 yuan, Xiao Fang spent 16 yuan, and Xiao Ming's remaining money is five times of Xiao Fang's

16 * 4-60 = 4 yuan. If Xiao Ming uses another 4 yuan, he will still have 4 times as much money as Xiao Fang. Now he has used 5 yuan less, so Xiao Ming has 5 times as much money as Xiao Fang. Therefore, Xiao Fang now has 4 / (5-4) = 4 yuan
So Xiaofang originally had 4 + 16 = 20 yuan
Xiaoming originally had 20 * 4 = 80 yuan