It takes 5 / 4 hours to arrive at the wholesale Station, and it takes only 3 / 2 hours to return, which means that It takes 5 / 4 hours for a car to deliver goods to B at the wholesale Station, which is 45km per hour. It took only 3-2 hours to return. What is the speed of the truck when it returns?

It takes 5 / 4 hours to arrive at the wholesale Station, and it takes only 3 / 2 hours to return, which means that It takes 5 / 4 hours for a car to deliver goods to B at the wholesale Station, which is 45km per hour. It took only 3-2 hours to return. What is the speed of the truck when it returns?

37.5km/h

How many kilometers does a car have to travel from a to B at the speed of 45km per hour, which is 5 / 7 of the whole journey in three hours?
There are two bags of soybean A and B. bag a contains 20 kg of soybean. If 1 / 6 of bag B is given to bag a, the two bags are the same weight. How many kg of soybean was originally contained in bag B? How many kg more than bag a?

How many kilometers does a car have to travel from a to B at the speed of 45km per hour, which is 5 / 7 of the whole journey in three hours?
45×3÷5/7×（1-5/7）
=135×7/5×2/7
=90 km
There are two bags of soybean A and B. bag a contains 20 kg of soybean. If 1 / 6 of bag B is given to bag a, the two bags are the same weight. How many kg of soybean was originally contained in bag B? How many kg more than bag a?
Bag B 20 (1-1 / 6-1 / 6)
=20÷2/3
=30 kg
Bag B is 30-20 kg more than bag a = 10 kg

The distance between a and B is 270 km. A car drives from a to B, and then returns from B. it travels 45 km per hour and 54 kn per hour when going and returning

270/(270/45+270/54)

When a car goes from a to B, it travels 50 kilometers per hour and 60 kilometers per hour when it goes back. It takes 5.5 hours to go back and forth. How many kilometers are there between a and B?

Suppose it takes x hours to go, & nbsp; & nbsp; & nbsp; & nbsp; 50x = 60 × (5.5-x), & nbsp; 50x + 60x = 330110x ／ 110 = 330 ／ 110, & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; X = 3, 3 × 50 = 150 (km), a: the distance between a and B is 150 km