ΔABC is similar to ΔDEF. Length of AB is 18 cm and length of the corresponding side DE is 10 cm. What is the ratio of Perimeter of ΔABC : Perimeter of ΔDEF?

The total surface area of a hemisphere is 166.32 sq cm, find its radius?

The third proportional of two numbers 9 and 24 is

The price of an article is cut by 33%, to restore to its original value, the new price must he increased by

The difference between simple and compound interests compounded annually on a certain sum of money for 2 years at 5% per annum is Rs 45. The sum is

The mean of marks secured by 60 students in division A of class X is 64, 40 students of division B is 60 and that of 60 students of division C is 58. Find the mean of marks of the students of three divisions of Class X.

If 2secA - (1 + sinA)/cosA = x, then the value of x is

If tan(A/2) = x, then the value of x is