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Since the new average increases by 0.35 years, the difference in the sum of ages of the students who left and the new students should be: 70×0.35=24.5 years Option I: (38+19+29)−(15+21+27)=23 years So, option I cannot be the answer. Option II: (44+19+29)−(15+21+33)=23 years So, option II cannot be the answer. Option III: (30+19+29)−(15+21+20)=22 years So, option III cannot be the answer.
Two pipes P and Q can fill tank A in 36 minutes and 72 minutes respectively and empty pipe M can empty the tank in 54 minutes. Tank A has the capacity o...
Pipe A alone fill the tank in x hours and Pipe B alone fill the tank in (x – 10) hours. If the efficiency of pipe B is triple of pipe A and pipe A...
A pipe can fill a tank in 18 minutes, while another can empty it in 27 minutes. If both pipes are opened simultaneously, how long will it take to fill t...
Pipes ‘A’ and ‘B’ can fill a tank in 6 hours and 8 hours, respectively and pipe ‘C’ can empty the full tank in 12 hours. All three pipes ar...
Pipe A and B can fill the pool in 36 minutes and 48 minutes, respectively. Pipe C can empty half filled pool in 36 minutes. If all the pipes are opened ...
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...
Pipe P can fill a tank in 12 hours, while pipe Q can fill the same tank in 20 hours. Both pipes are initially opened to fill an empty tank, but after 5 ...
Tap A can fill a tank in 9 hours. Tap B can fill 37.5% part of the same tank in 3 hours, whereas Tap C can alone empty a tank in ‘x’ hours. 2/5 part...
Pipe ‘A’ can fill a 240-litre tank in 15 hours. If pipe ‘A’ is 25% more efficient than pipe ‘C’ whereas pipe ‘B’ is 50% more efficient t...
Two taps A and B can fill a cistern in 12 min and 16 min respectively. If both taps are opened together and at the end of 4 min, B tap is turned off, th...
