If a car can cover 20 kms in 10 mins, then how much time will it take to cover 100 kms?
Two pipes P and Q can fill a tank in 36 mins and 45 mins each. A third pipe R can empty the tank in 30 mins. Initially, P and Q are opened and after 7 mins, R is also opened. How long will it take for the tank to fill up?
Ranajyoti walks at a speed of 24 kmph. During winter, due to cold he walked at 34th of his average speed. He arrived at his school 20 minutes late. What is the actual time he takes to cover distance between his home and his school?
A cuboidal water tank measuring 80 cm × 60 cm × 60 cm is filled from a pipe of cross sectional area 1.5 cm2. If speed of water is 3.2 m/s, then how long does it take to fill the tank?
To fill a tank, tubes P, Q and R take 10 minutes, 7.5 minutes and 6 minutes respectively. The time in minutes that the tubes together will take to fill the tank is: