Question

A train travels at a speed of 40 km/hr and another train at a speed of 20 m/s. find ratio of speed of the first train to that of the second train ?
A. `2:1`
B. ` 5 :9`
C. `5 :3`
D. `9 :5`

Answer 1

Correct Answer - B
Speed of train = 40 km/h
= `40 xx (5)/(18)` m/s
`therefore` Required ratio = `("Speed of first train")/("Speed of second train")`
= `(40 xx (5)/(18))/(20) = (2 xx 5)/(18) = (10)/(18) = (5)/(9)` or `5 :9`