If sohail walks from his home to office at 16km/hr.he is late by 5 min.If he walks at 20km/hr.he reaches 10 min before the office time. Find the distance of his office from his home?
A tank is 7 m long and 4 m wide.At what speed should water run through a pipe 5 cm broad and 4 cm deep so that in 6hr and 18 minutes water level in the tank risese by 4.5 m?
A motorcycle is twice as fast as a car and car is thrice as fast as scooter. The journey covered by scooter in 54 minutes will be covered by a motorcycle in?
(a)8 minutes
(b)12 minutes
(c)9 minutes
(d)none of these