Question

2. Find the total surface area of a cone, if its slant height
is 21 m and diameter of its base is 24 m. (NCERT EXERCISE)
(FULL EXPLANATION)
​

Answer 1

Step-by-step explanation:

u may look in google o dont know the ans

Answer 2

Answer:

$answer = 1244.57m^{2}$

Step-by-step explanation:

T•S•A of cone =

$\pi r(r + l)$

r = d/2 = 24/2 = 12m

slant height = 21m

TSA = 22/7 × 12 × (12+21)

= 22/7 × 12 × 33

= 22/7 × 396

= 8712 ÷ 7

$= 1244.57m^{2}$

SIMPLE !!