Question

You and your friend each drive 50.0 km. you travel at 90.0 km/h. your friend travels at 95 km/h. how long will your friend be waiting for you at the end of the trip?

Answer 1

(95km/hr)/50km=1.9
(90km/hr)/50km=1.8
1.9-1.8=0.1
so he will be waiting for .1 hrs

Answer 2

He will reach 0.02 hours before me.

Explanation:

A we know that,

Speed = Distance ÷ Time

Here we have given that Distance = 50 km

My Speed is 90 km/h

So time taken to complete my trip = Distance ÷ Speed

⇒ My Time = 50 ÷ 90 = 0.55 hours

Also, Speed of my friend is 95 km/h

So time taken to him to complete his trip = Distance ÷ Speed

His Time = 50 ÷ 95 = 0.53 hours

Thus he will reached before me as his speed is fast

He will reach 0.55 - 0.53 = 0.02 hours before me.