Two candles of the same length are made of different materials so that one burns out completelyat a uniform rate in 3 hours and the other in 4 hours. At what time (P.M.), should the candlesbe lighted so that at 5 P.M., one stub is twice the length of the other

Two candles having the same lengths are such that one burns out completely in 3 hours at a uniform rate and the other in 4 hours. At what time should both the candles be lighted together so that at 4 P.M. the length of one is twice the length of the other? (a) 1: 24 P.M. (b) 1: 30 P.M. (c) 1: 36 P.M. (d) 1: 42 P.M.

There are two candles of same length and same size.both of them burn at uniform rate. The frist one burns in 5 hours and the second one the second one burns in 3 hours. Both the candles are lit together. After many minutes the length of the first candle is 3 times is 3 times that of the other ?

Two wires of the same length are made of different materials. Diameter of the one is 2 mm and that of the other is 4 mm. When these two wires are stretched by the same force, the first one's elongation is twice the second's.compare their Young's modulus.

Ram and Shyam each has 1 candle of same length but different thickness . Ram 's candle take 3 hour to burn completely and that time of Shyam 's candle is 4 hours .They both light their candle at 11 pm then at what time length of Ram 's candle would be half of that of Shaym 's candle

Two candles of the same height are lighted at the same time the first is consumed in 8 hours and the second in 6 hours .Assuming that each candles burn at constant rate in how many time after being lighted the ratio of length become 5:4 .

Two wires made of same material have equal length and radius of one of them is twice that of the other. Find the ratio of their resistances.

A piece of wire is of length 12 3/4mdot if it is cut into two pieces in such a way that the length of one piece is 5 1/4m , what is the length of the other piece?