8. Curved surface area of a cone is 308 cm2 and its slant height is 14 cm. Find (i) radius of the base and SURFACE MEAS AND VOLUMES 189 (ii) total surface area of the cone.

What are the differences between similar triangles and congruent triangles?

What are Armstrong numbers?

All real numbers are rational numbers.

A) True

B) False

The L.C.M of the smallest 2 digit composite number and the smallest composite number is:

• (a) 12
• (b) 4
• (c) 20
• (d) 44

Are all natural numbers also whole numbers?