3.) AI 65 kom hr. Alfred can reach home in 50 minutes. At what speed should he drive his car so that he can reach home 10 minutes earlier?

He should drive his car at a speed of 81.25 kilometers per hour.

Step-by-step explanation:

With a velocity of 65 kilometers per hour, he reaches home in 50 minutes. What speed he needs to reach home 10 minutes earlier, that is, in 50 - 10 = 40 minutes?

To solve this, we use the relation between inverse proportion variables(as the velocity increases, time needed decreases), that is, a rule of three with line multiplication, instead of cross. So

65 kilometers per hour - 50 minutes

x kilometers per hour - 40 minutes

So

He should drive his car at a speed of 81.25 kilometers per hour.

351.23

step-by-step explanation: