The marks obtained by 17 students in a mathematics test (out of 100) are given below :
91, 82, 100, 100, 96, 65, 82, 76, 79, 90, 46, 64, 72, 68, 66, 48, 49.
The range of the data is :
(A) 46 (B) 54 (C) 90 (D) 100
30 circular plates, each of radius 14 cm and thickness 3cm are placed one above the another to form a cylindrical solid. Find :
(i) the total surface area
(ii) volume of the cylinder so formed.
A sphere and a right circular cylinder of the same radius have equal volumes. By what percentage does the diameter of the cylinder exceed its height ?
A cube of side 4 cm contains a sphere touching its sides. Find the volume of the gap in between.
The volumes of the two spheres are in the ratio 64 : 27. Find the ratio of their surface areas.
The water for a factory is stored in a hemispherical tank whose internal diameter is 14 m. The tank contains 50 kilolitres of water. Water is pumped into the tank to fill to its capacity. Calculate the volume of water pumped into the tank.
A semi-circular sheet of metal of diameter 28cm is bent to form an open conical cup. Find the capacity of the cup
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