The diameter of a sphere is decreased by 25%. By what per cent does its curved surface area


2

94

April 10, 2019

The front compound wall of a house is decorated by wooden spheres of diameter 21 cm


2

230

April 10, 2019

A wooden bookshelf has external dimensions as follows : Height = 110cm, Depth = 25cm


2

68

April 10, 2019

A capsule of medicine is in the shape of a sphere of diameter 3.5 mm


2

144

April 10, 2019

Twenty seven solid iron spheres, each of radius r and surface area S are melted


2

209

April 10, 2019

A dome of a building is in the form of a hemisphere. From inside, it was white washed


2

170

April 10, 2019

Find the volume of a sphere whose surface area is 154 cm2


2

122

April 10, 2019

A hemispherical tank is made up of an iron sheet 1 cm thick


2

222

April 10, 2019

How many litres of milk can a hemispherical bowl of diameter 10.5 cm hold?


2

345

April 10, 2019

The diameter of a metallic ball is 4.2 cm. What is the mass of the ball


2

123

April 10, 2019

Find the amount of water displaced by a solid spherical ball of diameter (i) 28 cm (ii) 0.21 m


2

295

April 10, 2019

Find the volume of a sphere whose radius is (i) 7 cm (ii) 0.63 cm


2

527

April 10, 2019

If the triangle ABC in the Question 7 above is revolved about the side 5 cm


2

298

April 10, 2019

A right triangle ABC with sides 5 cm, 12 cm and 13 cm is revolved about the side 12 cm


2

91

April 10, 2019

The volume of a right circular cone is 9856 cm3. If the diameter of the base is 28 cm


2

153

April 10, 2019

A conical pit of top diameter 3.5 m is 12 m deep. What is its capacity in kilolitres?


2

302

April 10, 2019

If the volume of a right circular cone of height 9 cm is 48 cm3, find the diameter of its base


2

80

April 10, 2019

The height of a cone is 15 cm. If its volume is 1570 cm3, find the radius of the base


2

147

April 10, 2019

Find the capacity in litres of a conical vessel with radius 7 cm, slant height 25 cm


2

205

April 10, 2019

Find the volume of the right circular cone with radius 6 cm, height 7 cm


2

339

April 10, 2019

A patient in a hospital is given soup daily in a cylindrical bowl of diameter 7 cm


2

135

April 10, 2019

A lead pencil consists of a cylinder of wood with a solid cylinder of graphite filled in the interior


2

234

April 10, 2019

The capacity of a closed cylindrical vessel of height 1 m is 15.4 litres


2

224

April 10, 2019

It costs ₹2200 to paint the inner curved surface of a cylindrical vessel 10 m deep


2

118

April 10, 2019

If the lateral surface of a cylinder is 94.2 cm2 and its height is 5 cm


2

213

April 10, 2019

A soft drink is available in two packs a tin can with a rectangular base of length 5 cm


2

163

April 10, 2019

The inner diameter of a cylindrical wooden pipe is 24 cm and its outer diameter is 28 cm


2

411

April 10, 2019

The circumference of the base of a cylindrical vessel is 132 cm and its height is 25 cm


2

209

April 10, 2019

A river 3 m deep and 40 m wide is flowing at the rate of 2 km per hour


2

485

April 10, 2019

A solid cube of side 12 cm is cut into eight cubes of equal volume


2

611

April 9, 2019
