Question

A train covers a distance of 10 km in 12 minutes. If its speed is decreased by 5 km/hr,
ee time taken by it to cover the same distance will be
1)10min
2) 11 min 20 sec
3) 13 mins
4)13 min 20sec​

Answer 1

Answer:

13 min 20 sec is the right answer

Answer 2

Answer:

d= 10km t= 12min = (12/60) hr = 1/5 hr

Speed= d/t

= 10/(1/5)

= 10x5 = 50km/hr

since the speed is reduced by 5km/hr

New speed= 45km/hr

New time= distance/new speed

= 10/45 hr = (10/45) x 60 min

= 40/3 min = 13 min 20 sec