In a mixture of milk and water, the proportion of water by weight was 75%. If in the 60 gm mixture 15 gm of water was ad…

If a is 60% of b, then what percent of 4a is 5b ?

The average marks obtained in a class of 50 students is 70%. The average of first 25 is 60% and that of 24 is 80%. What …

I paid Rs. 27.20 as sales tax on a watch worth Rs. 340. Find the rate of sales tax.

In a mixture there is 15% of salt. When 30 liter of water is evaporated, salt becomes 20% of mixture. Find the initial q…

A's salary was decreased by 50% and subsequently increased by 50%. How much percent does he lose ?

The population of a town is 1771561. If it had been increasing at 10% per annum, its population 6 years ago was :

The current birth rate per thousand is 32, whereas the corresponding death rate is 11 per thousand. The net growth rate …