The sum of squares of two numbers is 80 and the square of difference between the two numbers is 36. Find the product of tow numbers.

A student loses I mark for every wrong answer and scores 2 marks for every correct answer . If he answers all...

There are two stations of length 162 meters and 120 meters respectively . A train takes 15 seconds to pass fir...

A man rows a certain distance along the stream and against the stream in 1 hour and 1.5 hours respectively . I...

A milkman pays tk. 6.40 per liter of milk. He adds water and sells the mixture at tk. 8per liter. By doing thi...

A leading library charges c cents for the first week that a book is loaned and f cents for each day over one w...

Find the compound interest at the rate of 10% per annum for four yearss on the principal which in four years a...