Question

3. Curved surface area of a cone is 308 cm and its slant height is 14 cm. Find (1)
radius of the base and (ii) total surface area of the cone.
is 24 m. Find​

Answer 1

Answer:

Radius of base = 7 cm

Step-by-step explanation:

Curved surface area = C.S.A = 308

slant height = l = 14

we know, C.S.A = π × r × l

$308 = \frac{22 \times r \times 14}{7}$

$308 = 44 \times r$

$r = \frac{308}{44}$

$r = 7 \: cm$

$total \: surface \: area \: = \pi \times r(l + r)$

$t.s.a = \frac{22 \times 7(14 + 7)}{7}$

$t.s.a = 22 \times 21$

$t.s.a = 462 \: {cm}^{2}$