Question 98

Find the total surface area $$(in cm^2)$$ of a right circular cone of diameter 14 cm and slant height 10 cm.

Solution

Radius of cone, $$r=7$$ cm and slant height, $$l=10$$ cm

Total surface area of cone = $$\pi r(l+r)$$

= $$\frac{22}{7}\times7\times(10+7)$$

= $$22\times17=374$$ $$cm^2$$

=> Ans - (A)

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