sir what is the best way for solving the question of class 9th chapter of Surface areas and Volumes chapter of question no.1 of math of exercise 13.3 of math, what is the best way for solving the question of class 9th ncert book of question no.2 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)
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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) Q.2
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Radius of cone, r = 24/2 m = 12m
Slant height, l = 21 m
Formula: Total Surface area of the cone = πr(l+r)
Total Surface area of the cone = (22/7)×12×(21+12) m2
= 1244.57m2