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 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 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.

Two square pyramids have the same volume. The base edge of one is half that of the other. How many times the height of the second pyramid is the height of the first?

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

Anil sets an alarm in two different clocks The first alarm rings after every 3 hours and the second alarm rings after every 2 hours and 30 minutes. If both the alarms rang together at 2 p.m., what will be the time when they wtll next nng together?

The effective length of the first magnet is two times that of the second magnet. The effective length of the third magnet is one-third of the first magnet. If the effectiv length of the second magnet is 7.5 cm, the effective length of the third magnet is ______

A cistern can be filled by one tap in 4 hours and by another in 3hours.How long will it take to fill it if both taps are opened together?