Question
Fresh grapes contain 80% water while dry grapes contain
20% water. How many kilograms of fresh grapes are needed to make 500 grams of dry grapes?Solution
ATQ,
Fresh grapes: 20% solid Dry grapes: 80% solid Let weight of fresh grapes be x grams Solid content remains constant: 0.2x = 0.8 * 500 0.2x = 400 → x = 2000 grams = 2 kg
Pipe P can fill half of the tank in 8 hrs 5 min and pipe Q can fill the same tank completely in 16 hrs 5 min. Another pipe R can empty the full tank in ...
Two taps would fill a cistern in 18 and 24 minutes respectively. Both tapsbeing opened find when the Ist tap must be turned off so that the cistern may ...
Pipe ‘E’ alone can fill a tank in 15 hours. When pipe ‘E’ and ‘F’ are opened together, they can fill 90% of the same tank in 9 hours. Find t...
Pipes ‘A’ and ‘B’ can fill a tank in 6 hours and 4 hours respectively. When both pipes and an outlet pipe ‘C’ are opened together, (2/5)th o...
If a tank can be filled by a tap in 20 hours, but due to an outlet, it actually takes 8 hours longer to fill the tank, find the duration in which the ou...
Two pipes P1 and P2 can fill a cistern in 12 minutes and 15 minutes respectively. These pipes are opened alternately for 1 minute each, beginning with p...
A large cistern can be filled by two pipes, P and Q, in 16 minutes and 24 minutes, respectively. Pipe R can empty the cistern in ...
Pipe P can fill a tank in 25 hours and Pipe Q can emptied it is 30 hours. Pipe P starts filling and they opened for 1 hour each alternatively in what ti...
Tap A is 100% more efficient than tap B. Both the taps together can fill the tank in 6 hours. Find the time taken by tap C, which is 50% more efficient...
Tap A and Tap B fill a drum of volume 117 liters in 3 minutes. If their efficiencies are in the ratio x:y respectively and B alone takes to fill the cis...
Relevant for Exams:
