Question

A bus travels at 60km/h. 5 minutes later a train travels at 90km/h. How long will it take for the train to catch up ? Assuming they are both on the same road.

*detailed answer for extra points

Answer 1

10 minutes

Explanation:

t × s = d

if they catch up distance is equal and time is except for 5 minute difference

therefore s × t = s × t

convert minutes to hours

(a+5)/60 and a/60

60 × (a+5)/60 = 90 ×a/60

times both sides by 60

60a+300=90a

300=30a

a=10