A and B can do a piece of work in 6 and 12 days, respectively. If they work alternatively and A begins the work, in how many days will the work be completed?
Aisha and Razia can complete a work in 50 days and 75 days respectively. In how many days will the entire work be completed if both of them work together?
The speed of a bus from station A to B is 55kmph and while coming back from staion B to A, the speed of the bus is 95 kmph. The avergae speed (in kmph) of the bus during the whole journey is ?