If the radius and height of a cylinder increase by 20% and15% respectively. Then what is the % change in curved surface area? 

A rectangular sheet of metal is 40 cm by 15 cm. Equal squares of side 4 cm. are cut off at the corners and  the remainder is folded up to form an open rectangular box. The volume of the box is-

The diagonal of a rectangle is 17 cm long and its perimeter is 46 cm. Find the area of the rectangle.

A took 15 sec. to cross a rectangular field diagonally walking at the rate of speed 52m / min and B took the same time to cross the same field along its sides walking at the rated speed 68 m / min. The area of the field is: 

The area of a circle, is 3850 sq.m. What will be its circumference?

In circular measure, the value of the angle 11⁰15’ is : 

The perimeter of a triangle is equal to perimeter of a rectangle. Length of rectangle is 75% of side of a square and ratio of length to breadth of rectangle is 3 : 2. If difference between perimeter of square and that of rectangle is 36 cm, then find perimeter of triangle?

The base of a triangle is 15 cm and height is 12 cm. The height of another triangle of double the area having the base 20 cm is