Grandfather takes a car, Xiao Li rides a bicycle, and goes from a to B at the same time along a road. The car travels 40 kilometers per hour, which is 2.5 times the speed of the bicycle. As a result, grandfather arrives at B three hours earlier than Xiao Li. How many kilometers is the distance between a and B?

[(40 ﹣ 2.5 × 3) ﹣ 40-40 ﹣ 2.5)] × 40 = [48 ﹣ 24] × 40 = 2 × 40 = 80 (km) a: the distance between a and B is 80 km

A car, B bike, along a road from a to B at the same time, the car 40 kilometers per hour, is 2.5 times the speed of the bicycle, the result a than B
How many kilometers is the distance between a and B?
Analysis, good answer, plus points

80 km
The speed of B is 16 km / h. It takes two hours for a to complete the journey and five hours for B

Xiao Ming goes from place a to place B by car and his father goes by bike along a road at the same time. The speed of the car is 2.5 times faster than that of the bicycle,

Assuming that it takes x hours for the car to arrive at B, it means that it takes x + 2 hours for Xiaoming's father's bike to arrive at B, then the formula is as follows: 75X = 30 (x + 2), the calculated x = 4 / 3 hours, so the distance between ab and ab is 75x4 / 3, then the distance between AB and ab is 100km