R S Aggarwal and Veena Aggarwal Solutions for Exercise 5: MULTIPLE-CHOICE QUESTIONS (MCQ)

[Take $\mathrm{\pi }=\frac{22}{7}$]

The ratio between the radius of the base and the height of the cylinder is $2:3$. If its volume is $1617 {\mathrm{cm}}^3$, the total surface area of the cylinder is 

The radii of two cylinder are in the ratio $2:3$ and their heights are in the ratio $5:3$. The ratio of their volumes is 

Two circular cylinders of equal volume have their heights in the ratio  $1:2$. The ratio of their radii is 

The radius of the base of a cone is $15 \mathrm{cm}$ and its height is $12 \mathrm{cm}$. Its curved surface area is 

[Take $\mathrm{\pi }=\frac{22}{7}$] 

The diameter of the base of a cone is$42 \mathrm{cm}$ and its volume is $12936 {\mathrm{cm}}^3$. Its height is 

[Take $\mathrm{\pi }=\frac{22}{7}$]

The area of the base of a right circular cone is $154 {\mathrm{cm}}^2$ and its height is $14 \mathrm{cm}$. Its curved surface area is 

On increasing each of the radii of the base and the height of a cone by $20\%$, its volume will be increased by

A metallic cone having base radius $2.1 \mathrm{cm}$ and height $8.4 \mathrm{cm}$ is melted and moulded into a sphere. The radius of the sphere is