Atul starts 4.5 minutes after chiru from the same point, for a place at a distance of 3.5 miles from the starting point

Atul starts 4.5 minutes after chiru from the same point, for a place at a distance of 3.5 miles from the starting point. Chiru on reaching the destination turns back and walk a mile where he meets Atul. If chiru’s speed is a mile in 6 minutes then Atul’s speed is a mile in how much time?

(a)          3 min

(b)          5 min

(c)           7 min

(d)          9 min

 Sol:

Total distance = 1600 × 3.5

= 5600 meter.

A|————————-|B

Distance covered in 4.5 mint by Chiru is

1600/6*9/2=1200 m

Total distance covered by chiru

After 4.5 mint = 3600 – 1200 + 1600

= 6000 m

Distance covered by Atul =

Speed for 1 mile