In a quadrilateral PQRS, l_S= 90°. A circle (o, r) touches the sides PQ, QR, RS and SP at A, B, C and D respectively. If QR= 38 cm, RS = 25 cm and QA = 27 cm, find 'r'.
Find the surface area (in cm2) of a sphere of diameter 28 cm.
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What is the measure of an interior angle of a regular polygon of 8 sides?
Find the volume (in cm3) of a right circular cone of diameter 7 cm and height 7 cm.
∆PQR is right angled at Q. If m∠P = 60 deg, then find the value of (secR + 1/2).
Find the volume (in cm3) of a hemisphere of diameter 7 cm.
In ΔPQR measure of angle Q is 90 deg. If tanP = 24/7, and PQ = 14cm, then what is the length (in cm) of side QR?
Find the surface area (in sq.cm) of a sphere of diameter 14 cm.
If the edge of a cube is increased by 3 cm, the volume will increase by 657 cub.cm. What then is the original length of each edge of the cube?
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