Question

1) C.S.A of cone is 4070 cm
and its diameter is slom. what
is slant height.
Sol C.S.A of cone = Tol
I
Vonth
142 +4070​

Answer 1

Curved surface area of a cone =πrl, where r is the radius of the cone and l is the slant height.

Radius = Diameter/2 =35 cm

Hence, curved surface area of this cone =

22/7×35×l=4070

⇒l= 7×4070/22×35

⇒l=37 cm

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