Question

I went from A to B and returned to A by car. I drove at 40km/h on the way to B and at 30km/h on the way back from B. It took 7 hours in total. How long did it take on the way to B and on the way back from B respectively.

Answer 1

On the way to B, it took 1 hour. On the way back from B, it took 5 hours.

Step-by-step explanation:

To determine how long it took on the way to B and on the way back from B, we can use the formula:

time = distance / speed

Let's denote the time on the way to B as t1 and the time on the way back from B as t2. We can set up the following equations:

t1 + t2 = 7 (total time)

40 / 40 = t1 (distance / speed)

40 / 30 = t2 (distance / speed)

Simplifying the equations, we get:

t1 = 1 hour

t2 = 5 hours

Therefore, it took 1 hour on the way to B and 5 hours on the way back from B.