Question 1

A big iron boiler tank that is cylindrical in shape is open at the top. Its height is 10m and the radius is 7m.It gets corroded at a rate of 3 m^2 /day. The number of days it will take to corrode completely is __________ . Use Pi = 22/7

Accepted Answer

198

Answer

202

Answer

192

Answer

208

Question 2

A water container can hold 40 litres of water.Then the total number of ice cubes of side 5cm which the container can hold is _______

Accepted Answer

320

Answer

480

Answer

200

Answer

280

Question 3

A 3 x 3 Rubik's cube has a total surface area of 54cm^2. The area occupied by every single red tile of the cube is ______

Accepted Answer

1 cm^2

Answer

0.25cm^2

Answer

9cm^2

Answer

3 cm^2

Question 4

A juice seller fills juice into cylindrical glasses from a big cylindrical container of height 35.2 cm and radius 10cm. He charges Rupees 10 for a glass of height 10cm and a radius 4 cm. The amount he earns by selling the juice is ______.

Accepted Answer

220

Answer

170

Answer

110

Answer

190

Question 5

A hemispherical bowl fits exactly on the flat surface of a right circular cone whose height is 5cm and a radius is 3.5 cm. The volume of the solid formed is ______.

Accepted Answer

154cm^3

Answer

144cm^3

Answer

132cm^3

Answer

169cm^3

Question 6

Pavan drew a triangle ABC right angled at B. He says if the right angle triangle is rotated along AB then it will result in ______.

Accepted Answer

Cone

Answer

cylinder

Answer

cuboid

Answer

Cube

Question 7

The ratio of the radius to the height of a right cone is 3:4. Then the ratio of total surface area to the curved surface of the cone is _______.

Accepted Answer

8:5

Answer

2:3

Answer

7:9

Answer

3:5

Question 8

If the radius of a cylinder is reduced by 50% then the volume of the cylinder will be reduced by __________.

Accepted Answer

75%

Answer

25%

Answer

50%

Answer

40%