How i find the best tricky way for solving the question of class 9th of Surface areas and Volumes chapter of class 9th give me the best and easy method for this question no.2(3) of exercise 13.4 Find the surface area of a sphere of diameter: (iii) 3.5cm
Share
Radius(r) of sphere = 3.5/2 = 1.75 cm
Surface area of sphere = 4πr2
= 4×(22/7)×1.752 = 38.5
Surface area of a sphere is 38.5 cm2