SSC CHSL 7 Mar 2018 Shift 1 Paper

Section: English Language

Question : 23 of 100

Marks: +1, -0

The curved surface area and the slant height of a right circular cone are 99 cm2 and 9 cm respectively.
Find its diameter (in cm).

Solution:

Let radius of cone = cm and slant height of cone =

l=9

cm
Curved surface area of cone =

π r l

⇒

22/7 ×r × 9 = 99

⇒

r =99/ 9 × 7/22

⇒

r=7/2=3.5

cm
∴ Diameter of cone =

2×3.5 = 7

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