Question

A bus cover a certain distance in 3 hours 20 minutes at an average speed of 45 km/hr how long will take to cover the same distance at a speed of 40km/hr

Answer 1

3hrs 20 mins = 3 1/3 hour.
speed = 45km/h.
∴distance=45×10/3
=15×10=150km.
Now speed = 40km/h
distance=150km.
∴time= 150/40
=15/4
= 3hour45min