1. The distance between a and B is 520km. A bus is going from a to B, and a truck is going from B to a After 6.5 hours, the two cars meet. How many kilometers does the passenger car travel per hour and the freight car travel per hour? 2. Seven logs with a diameter of 2m are tightly tied together with a thick rope. How many meters is the length of the thick rope

1. The distance between a and B is 520km. A bus is going from a to B, and a truck is going from B to a After 6.5 hours, the two cars meet. How many kilometers does the passenger car travel per hour and the freight car travel per hour? 2. Seven logs with a diameter of 2m are tightly tied together with a thick rope. How many meters is the length of the thick rope

1. Speed sum = 520 △ 6.5 = 80 km / h
Speed of truck = 80-44 = 36 km / h
Comprehensive: 520 △ 6.5-44
=80-44
=36
2. 2 × 3.14 = 6.28m

It takes 6 hours for bus to go from a to B and 8 hours for truck to go from B to a
The two vehicles set out from two places at the same time. When they met, they traveled 240km to find the distance between the two places

It takes 6 hours for bus to go from a to B and 8 hours for truck to go from B to a
When the time is the same, the distance ratio is 8:6 = 4:3
Distance between a and B = 240 * (4 + 3) / 3 = 560

It takes six hours for a bus to go from place a to place B; it takes eight hours for a truck to go from place B to place a. the two cars start from place a and place B and run in opposite directions. Can they meet in three hours?

Setting: the distance between a and B is 1
The speed of a is 1 / 6, the speed of B is 1 / 8
The time for the two vehicles to travel in opposite directions is as follows:
1/(1/6+1/8)=24/7>3
So no

The bus and the truck go from a and B to each other and meet in 12 hours. After meeting, the bus arrives in B in 8 hours. How many hours does the truck arrive in a?

When they met, both cars were 12 hours away
After the meeting, the bus line is just 12 hours away from the truck line
The freight car line is just 12 hours away from the bus line
The same journey takes 12 hours for trucks and 8 hours for buses
The time of freight car is 12 / 8 = 1.5 times that of passenger car
Then the bus 12 hours journey, freight car: 12 * 1.5 = 18 hours

Passenger cars and freight cars start from city a and city B at the same time and travel in opposite directions. The passenger cars arrive at city B in 12 hours, and the freight cars arrive at city a in 15 hours. How many hours later are the two cars still 25% of the total length?

(1-25%) / (112 + 115) = 34 / 960 = 5 (hours); answer: after 5 hours, the distance between the two cars is 25% of the total length

Passenger cars and freight cars start from city a and city B at the same time and travel in opposite directions. The passenger cars arrive at city B in 12 hours, and the freight cars arrive at city a in 15 hours. How many hours later are the two cars still 25% of the total length?

(1-25%) / (112 + 115) = 34 / 960 = 5 (hours); answer: after 5 hours, the distance between the two cars is 25% of the total length

It takes three hours for a bus and five hours for a truck to go from place a to place B. now, the two cars start from both places at the same time and travel in opposite directions. How many hours later, the two cars travel 4 / 5 of the whole journey

From place a to place B, it takes three hours for buses and five hours for trucks. Now, the two vehicles are facing each other at the same time. How many hours later, the two vehicles travel four fifths of the whole journey
What's the formula

Time
=4 / 5 (1 / 3 + 1 / 5)
=4 / 5 (5 / 15 + 3 / 15)
=4 / 5 ÷ 8 / 15
=Three out of two hours
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The distance between a and B is 330 km. At 10 am, a truck starts from a to B, and at 2 pm, a bus starts from B to a for 2 hours
After that, the two cars met. How many kilometers does the truck travel per hour, and how many kilometers does the bus travel per hour?

From 10 a.m. to 2 p.m., a total of 4 hours, plus the meeting is two hours after the bus set out, that is 4 p.m., the two cars met, get a total of 6 hours (4 + 2 = 6), then the total driving distance of the truck is: 6 hours × 40 km / h = 240 km, the remaining distance is: 330 km - 240 km

12 hours later, the bus is still 1 / 9 of the distance from place B, and the truck is more than 50 km from the midpoint. It is known that the bus travels 18 km more per hour than the truck. How many km is the distance between Party A and Party B

The bus takes 12 hours more than the train, 12x18 = 216 km, the truck takes 1 / 2 of the whole journey plus 50 km & nbsp; (216 + 50) / (8 / 9-1 / 2) = 266 / 7 / 18 = 684 km
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