Three pipes, A, B, & C are attached to a tank. A & B can fill it in 20 & 30 minutes respectively while C can empty it in 15 minutes. If A, B & C are kept open successively for 1 minute each, how soon will the tank be filled?
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There are 8 stamps, 4 Red and 4 Green. There are three logicians also. One moderator sticks thow stamps each on the forhead of each logician such that each of them can see all the stamps except those on his forhead and the two in moderator's pocket. Then the moderator asked each whether he knows the colors of the stamps he wears? Then the answeres were: A: "No" B: "No" C: "No" A: "No" B: "Yes" What were the colours of the stamps that B wears?
What is integrity pact ?
The length, width and height of a room is 3,2,1 respectively. The length of the room is doubled and height and width is halved .then percentage decrease in area of wall. is........... a) 13.6% b) 27.2% c) 10% d) none of these
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albert and fernandes they have two leg swimming race. both start from opposite and of the pool. On the first leg, the boys pass each other at 18 mt from the deep end of the pool. during the II leg they pass at 10 mt from the shallow end of the pool. Both go at const speed. but one of them is faster. each boy rests for 4 sec to see at the end of the i leg. what is the length of the pool.
The difference between a number and its three-fifth is 50. What is the number? (a) 75 (b) 100 (c) 125 (d) 80 (e) None of these
A can do a piece of work in 20 days, which B can do in 12 days. In 9 days B does ¾ of the work. How many days will A take to finish the remaining work?
A dishonest hairdresser uses a mixture having 5 parts after-shave lotion and 3 parts water. After taking out some portion of the mixture, he adds equal amount of water to the remaining portion of mixture such that the amount of after shave lotion and water become equal. Find the part of mixture taken out.
A shopkeeper bought a watch for Rs.400 and sold it for Rs.500.What is his profit percentage?
.In a family there are many children , boy have equal no.of brothers&sisters, girl have twice no.of brothers&sisters .Find the no.
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4 cows are there at the four corners of a square. if the radius of the rope is 1 and lenth of one side of the square is 14, find the area along the square which the cow cannot gaze.