Question

The curved surface area of a cone is 4070 cm^2 and its diameter is 70 cm. What is its slant height?

Answer 1

csa of cone=4070 cm sq
diameter =70 cm
radius=35 cm
CSA of cone =4070

$\pi$
rl =4070
22/7×35×l=4070
22×5=4070
l=4070/110
l= 37 cm

Answer 2

Answer:

CSA of a cone=4070$cm^{2}$

radius=35cm (d=$\frac{70}{2}$=35cm)

h=?

CSA=$\pi$rl

4070=$\frac{22}{7}$ x 35 x h

4070=110 x h

h= $\frac{4070}{110}$=37 cm