If the area os a triangle is 81 square cm and its perimeter is 27 cm, then find its in-radius in centi-metres.

The ratio of the measures of three sides of a triangle is 4 : 2 : 3 and its perimeter is 36 cm. Find the area of this triangle.

If the lateral surface area of a cylinder is 94.2 cm^(2) and its height is 5 cm, then find (i) radius of its base and (ii) its volume. (Use pi=3.14 )

The ratio of the lengths of sies of a triangle is 13 : 14 : 15 and its perimeter is 84 cm. Find its area.

Find the area of a triangle two sides of which are 18 cm and 10 cm and the perimeter is 42 cm.

If the surface area of a sphere is 154 cm ^(2) , find its radius

The area of a triangle is 48 cm^(2) and one of its sides measures 12 cm. Then, the length of the altitude corresponding to this side is …………….cm.

The diameter of the base of a right circular cylinder is 28 cm and its height is 21 cm. Find its curved surface area.

Sides of a triangle are in the ratio of 12 : 17 : 25 and its perimeter is 540 cm. Find its area.

Two sides of a triangle measure 9 cm and 10 cm. If the perimeter of the triangle is 36 cm, then its area is ………….. cm^(2)

The surface area of a sphere is 616 cm^(2) . Then, its radius is ……… cm.