Question

A train first travels for 120 min with a speed of 30km/hr and then for 180 min with a speed of

40km/hr in the same direction. Calculate (a) the total distance travelled.(b) the average speed
of the train.​

Answer 1

Explanation:

a)1)D= S×t

Speed = 30 km/hr

Time = 1min= 1/60 hr

120 min = 120/60 hr

= 2 hr

D= 30×2km

D=60 km

a)2)D= S×t

speed= 40km/hr

time=1 min=1/60hr

180min=180/60 hr

=3 hr

D=s×t

D= 40×3km

D= 120 km

TOTAL DISTANCE

=120km + 60km

Answer =180 km