The radius and height of a cone are in the ratio 4:3. The area of the base is 154 cm. Find the area of the curved surface.
Answers
Answered by
6
Answer:
Step-by-step explanation:
radius:height=4:3
area of base =154cm^2
area of base formula=πr²
r=7 cm
r:h=4:3
7:h=4:3
h=21/4
so csa of cone πrl
l=√h²+r²
l=8.75
πrl=192.425
csa of cone=192.425
Answered by
9
★ Question ★
the radius and height of a cone are in ratio 4:3 . the area of the base is 154cm^{2}. find the area of curved surface.
◇ Answer ◇
radius and height =.4:3
let the unit of ratio be = x
then,
r=4x
h=3x
slant height ( length) =↓
★ Area of the base =
Now,
slant height ↓
→ C.S.A = πrl
Similar questions