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chapter-13
exercise-13.3
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Answer 1

Q.Find the total surface area of a cone, if its slant height is 21 m and diameter of its base is 24 m. (Assume π = 22/7)

Ans :- Radius of cone, r = 24/2 m = 12m

of cone, r = 24/2 m = 12mSlant height, l = 21 m

of cone, r = 24/2 m = 12mSlant height, l = 21 mFormula: Total Surface area of the cone = πr(l+r)

of cone, r = 24/2 m = 12mSlant height, l = 21 mFormula: Total Surface area of the cone = πr(l+r)Total Surface area of the cone = (22/7)×12×(21+12) m2

of cone, r = 24/2 m = 12mSlant height, l = 21 mFormula: Total Surface area of the cone = πr(l+r)Total Surface area of the cone = (22/7)×12×(21+12) m2= 1244.57m2

Answer 2

Step-by-step explanation:

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