Question

C.S.A of cone 88 cm^2 and it's slant height is 7 cm. find the T.S.A of cone.

plz answer step by step. ​

Answer 1

Answer:

TSA = 138.24 cm^2

Step-by-step explanation:

CSA = pi x r x l

$88 = \frac{22}{7} \times r \times 7$

(7 gets cancelled from N and D)

$\frac{88}{22} = r$

r = 4 cm

TSA = CSA + Area of base

= 88 + pi x r^2

= 88 + 3.14 x (4^2)

= 88 + 3.14 x 16

= 88 + 50.24

TSA = 138.24 cm^2

Answer 2

Answer:

T.S.A. =138.24cm^2

Step-by-step explanation:

C.S.A.=pi×R×l

88=22/7×R×7

(7 gets cancelled from N and D)

88/22=R

R=4cm

T.S.A. =C.S.A. +area of base

=88+pi×R²

=88+3.14×16

=88+50.24

T.S.A.=138.24cm²