Tag: math & puzzles

A tank has four pipes attached to it. The first one takes 60 hours to fill the tank, second one takes 80 hours to do the same, third one takes 40 hours to empty the tank and the fourth one takes 720 hours to empty the tank. Four taps are opened at the same time. How long will it take to fill the tank if the tank is half-filled before opening the taps?

Two runners started running from a particular point. The first runner runs 60 KMPH towards East and the second 80 KMPH towards North. Both the runners stop after 30 minutes. A third runner starts from the point where the first one stopped. How long will he take to reach the point where the second runner stopped if the third runner runs 100 KMPH?

Grade O=10 Points Grade E=9 Points Grade A=8 Points Grade B=7 Points Grade C=6 Points Grade D=5 Points Grade F=4 Points A Student had Science, History, Language, Math and Science Practical courses each of 4 hours credit and score D in Language, C in History, A in Science, E in Math and O in Science Practical. How much he scored in a 10 Point Scale?

A tank has four pipes attached to it. The first one takes 60 hours to fill the tank, second one takes 80 hours to do the same, third one takes 40 hours to empty the tank and the fourth one takes 720 hours to empty the tank. Four taps are opened at the same time. How long will it take to fill the tank if the tank is half-filled before opening the taps?