Question

You and a friend each drive 50 km to the same destination. You travel at 88.5 km/h and your friend at 94.5 km/h. How long will your friend wait for you at the end of the trip

Answer 1

your friend will wait for you for 2.2 minutes.

Step-by-step explanation:

Given;

Distance of the journey, d = 50 km

your speed, v₁ = 88.5 km/h

your friends speed, v₂ = 94.5 km/h

The time taken before you reached the end of the trip;

`time = (distance )/(speed) \\\\t_1 = (d)/(v_1) \\\\t_1 = (50)/(88.5) \\\\t = 0.565 \ hour`

The time taken before your friend reached the end of the trip;

`time = (distance )/(speed) \\\\t_2 = (d)/(v_2) \\\\t_2 = (50)/(94.5) \\\\t = 0.529 \ hour \\\\`

The difference in time = (0.565 - 0.529) hour

= 0.036 hour

= 0.036 x 60 min

= 2.2 mins

Therefore, your friend will wait for you for 2.2 minutes.