A jar contains white, red and green marbles in the ratios 2 : 3 : 5 six more green marbles are added to the jars and then the ratio becomes 2 : 3: 7 Hoe may white marbles are there in the jar?

The length of a rectangular plot is 3 folds its width . Half the area of the plot is covered by a playground w...

A box contains 10 electric bulbs from which 2 bulbs are defective . Two bulbs are chosen at random. What is th...

Three pipes A, B and C can fill a tank in 6 hours. After working at it together for 2 hours. C is closed and A...

If x= 7 - then find the value of

An employer pays 3 workers X, Y and Z a total of Tk. 36600 a week. X is paid 125% of the amount Y is paid and...

The volume of a rectangular solid is to be increased by 50% without altering its base. To what extent the heig...