The radius and ht of a cone are
in the ratio 4:3 .The area OF
its base is 154 cm *2? Find its csa
Answers
Answered by
0
Answer:
192.5 cm²
Step-by-step explanation:
Cone base is in circular shape. So, the base area is the area of the circle.
Base area = πr² = 154
r = 7cm
r:h = 4:3
r = 4x ; h = 3x
4x = 7
x = 7/4
3x = (7/4)×3 = 21/4 = 5.25
Height = 5.25 cm
CSA of cone = πrl
l = √r²+h²
= √7²+5.25²
= 8.75 cm
CSA = πrl = (22/7) × 7 × 8.75
= 192.5 cm²
Similar questions