Ashish studies for 4 hours, 5 hours and 3 hours respectively on three consecutive days. How many hours does he study daily on an average?

How many hours you should study everyday?

Lalit reads a book for 1 3/4 hours every day and reads the entire book in 6 days. How many hours does he take to read the entire book?

Pipes A. B and C can fill a tank in 30 hours, 36 hours and 28 hours, respectively. All the three pipes were opened simultaneously. If A and C were closed 5 hours and 8 hours respectively, before the tank was filled completely, then in how many hours was the tank filled?

Three clocks are designed to alarm onceevery hour every two hours and every three hours respectively. If they are alarmed together now after how many hours they will together alarm next? (A) 3 h (B)6 h (C ) 4 h (D) 12 h

Four taps can individually fill a cistern of water in 1 hour, 2 hours, 3 hours and 6 hours respectively. If all the four taps are opened simultaneously, the cistern can be filled in how many minutes ?

Define watt-hour. How many joules are equal to 1 watt-hour?

Two pipes A and B can fill a tank in 6 hours and 4 hours respectively.If they are opened on alternate hours and if pipe A is opened fist in how many hours the tank shall be full? 4 b.5 c.4(1)/(2) d.5(1)/(2)