Someone rides a bicycle from place a to place B. in the first 20 minutes, he finishes one fifth of the whole journey. Then he speeds up, 60 meters more per minute and 15 meters more than before It's 1.8 kilometers away from B. how many kilometers are there between a and B?

Someone rides a bicycle from place a to place B. in the first 20 minutes, he finishes one fifth of the whole journey. Then he speeds up, 60 meters more per minute and 15 meters more than before It's 1.8 kilometers away from B. how many kilometers are there between a and B?

If the total distance is x km, then (x / 5 / 20 + 0.06) * 15 + 1.8 = 4x / 5, the distance between a and B is 54 / 13 km

From place a to place B, you can walk 4 kilometers per hour and ride a bicycle 12 kilometers per hour. It takes 5 hours less to complete the whole journey by bicycle than by walking
How many kilometers is the distance between a and B? (use equation solution), the steps should be written out. Thank you. I'm in a hurry. Kneel down and ask for the answer. Thank you

Let X / 4-x / 12 = 5, x = 30

The speed someone can't do is 10 kilometers per hour, and the speed of cycling is 30 kilometers per hour. From place a to place B, half the distance is walking, half the distance is walking
Then they return to land a along the original road. Half of the time they walk and half of the time they ride. As a result, the return time is 40 minutes less than the time they go. The distance between a and B is calculated

Suppose the distance X between a and B, according to t = s / V, the round trip time is 40 minutes, then there are:
[X/2/10+X/2/30]-X/2/(10+30)=40/60
X=40

Xiaoqiang from a to B, first bike half of the whole journey, 12 kilometers per hour. The rest of the walk, 4 kilometers per hour

Hello
The speed ratio of cycling and walking is 12 ∶ 4, that is, 3 ∶ 1
That is, the time spent on cycling: the time spent on walking = 1:3
﹙12×1﹢4×3﹚÷﹙1﹢3﹚
＝24÷4
The average speed is 6 kilometers per hour