Question

Walking at 4/7 of its usual speed, a train is 9 minutes late. Find its usual time to cover the journey. ( A ) 10 ( B ) 12 ( C ) 8 ( D ) 15

Answer 1

Answer:

(B) 12

Step-by-step explanation:

let distance covered by train be 'd'

let speed be 'v'

according to the problem

7d/4v-d/v=9

3d/4v=9

d/v=12

time taken=12 min