Question

A certain journey took 40 min to complete. If half the distance was travelled at an average speed of 100 km/h and the other half at an average speed of 60 km/h, what was the length of the journey?

Answer 1

Answer:

160/3 kms

Explanation:

Since each speed is given at the half of the journey, so in

Case I: When speed is 100 km/h,

We know that speed = distance/time, so distance = speed × time

》distance = (100 × 1)/3

》distance = 100/3 kms

Case II: When speed is 60 km/h,

distance = speed × time

》distance = 60 × 1/3

》distance = 20 km

total distance = (100/3 + 20) kms

》" = (100+60)/3

So total distance = 160/3 kms