Two pipes A and B can fill a tank in 10 and 20 minutes respectively.If both pipes are opened simultaneously,after how many minutes should pipe B be closed so that the tank is full in 8 minutes?
A. 3 min
B. 4 min
C. 2 min
D.5 min
Out of 8 crew members 3 particular members can sit only on the left side.Another 2 particular members can sit on the right side.Find the number of ways in which the crew can be arranged so that four men can sit on each side
MATHEMATICS have Strong Heart! So only, it will face so many "PROBLEMS"!!
Vignesh R (India)
There r few things whch we knw whch r nt capable of mathmatical reasoning nd when these can nt it is a sign dt our knowledge of them is very smal nd confusd nd where a mathmaticl reasing can be had . It is as dark a foly to make use a candle stick as to g