Walking at 5 km / h Harshit reaches his school from his house 15 minute early and walking at 3 km/h he is late by 9 minutes. What is the distance between his school and his house?

A square and an equilateral triangle are of the same perimeter. If the diagonal of the square is  cm long, then the area of the triangle is.

The figure below is an equilateral triangle with sides of length 6. What is the area of the triangle?

The real number to be added to 13851 to get a number that is divisible by 87 is :

A can do a work in 6 days and B can do the same work in 12 days. If A, B and C together can do the same work in 4 days, then in how much days C can do it alone?

(sec A + tan A – 1) (sec A – tan A+1) =?

Three numbers are such that the average of first two numbers is 2, the average of the last two numbers is 3 and the average of the first and the last numbers is 4, then the average of three numbers is equal to. 

The product of two number is 4107. If the HCF of the number is 37. The greatest number is