Question

The velocity of train increases uniformly from 20 km/h to 60 km/h in 4 hours. The distance travelled by the train during this period is

(a) 160 km

(b) 180 km

(c) 100 km

(d) 120 km.

Answer 1

Correct option (a) 160 km

Explanation:

Initial velocity (a) = 20 km/h; Final velocity

(v) = 60 km/h and time (t) = 4 hours.

velocity (v) =  60 = u + at = 20 + (a x 4)

Therefore distance travelled in 4 hours is s