Question
If 56 # 93 = 57 and 78 # 46 = 80, then 69 # 53 =
?Solution
56 # 93 = {(5 x 6) + (9 x 3)} = {30 + 27} = 57 78 # 46 = {(7 x 8) + (4 x 6)} = {56 + 24} = 80 Similarly, 69 # 53 = {(6 x 9) + (5 x 3)} = {54 + 15} = 69.
Two pipes A and B can fill a tank in 24 min., and 32 min, respectively. If both the pipes are opened simultaneously, after how much time B should be clo...
Pipe P can fill a tank in 5 hours, but pipe Q can empty it completely in 20 hours. If both are opened together, find the time needed to fill the tank.
Pipes ‘A’ and ‘B’ can fill a tank in 6 hours and 9 hours, respectively. If pipe ‘C’ is opened along with pipes ‘A’ and ‘B’, then the...
Pipe A can fill a tank in 45 minutes while pipe B can fill it in ____ minutes. There’s a leak in the tank which can empty it in _____minutes. When bot...
A tank has three pipes, X, Y, and Z. X can fill the tank in 8 hours, Y can fill it in 12 hours, and Z can empty it in 6 hours. If X, Y, and Z are opened...
A single tap takes 8 hours to fill the entire tank. Initially, only one tap is open, and it fills one-fourth of the tank. At that point, three additiona...
- Pipe 'A' is 5 times as efficient as pipe 'B'. Pipe 'C', which is one-fifth as efficient as pipe 'B', can fill a tank alone in 25 hours. Find difference bet...
Pipe ‘A’ and pipe ‘B’ can fill a cistern in 20 minutes and 10 minutes respectively. Pipe ‘C’ alone can empty the cistern in 12 minutes. If a...
With a bucket full of water, a tank can be filled with 16 buckets. When each bucket holds 12.5 liters of water, how many buckets of 10-liter capacity ca...
Pipes A and B can fill the tank in 16 and 20 hours respectively. Pipe C empties it in ‘x’ hours. If all are opened together, the tank gets filled in...
Relevant for Exams:
