Quantitative Aptitude - Arithmetic Ability Questions

What is the total surface area (in sq cm) of a hollow cylinder open at both ends, if its length is 22 cm, external radius is 7 cm and thickness is 1 cm? (Take π = 22/7)

The total surface area of a hemisphere is 41.58 sq cm, find its radius.

Two trains are moving in the same direction at the speed of 24 km/hr and 50 km/hr. The time taken by faster train to cross a man sitting in the slower train is 72 seconds. What will be the length (in metres) of the faster train?

If the cost price of 20 books is the same as selling price of 25 books, then the loss percentage is

Triangle ΔXYZ is similar to ΔPQR. If XY:PQ=5:1. If Area of ΔPQR is 5 sq cm, what is the area (in sq cm) of ΔXYZ?

4 years ago, the ratio of Vikah's to Rahul's age was 3:5. After 6 years, this ratio would become 4:5. Find present age of Rahul.

Four numbers A, B, C and D are such that their overall average is 16. The average of A and B is 9.5. The average of C and D is

If the angles of a triangle are in the ratio of 2 : 5 : 8, then find the value of the largest angle.