Question

the curved surface area of a right circular cylinder of height 21 cm is 957cm find the diameter of the base of cylinder

Answer 1

CSA OF CYLINDER= 2πrh
957=2×22/7.r21
r=957/44.3th
r=7.25
d=7.25.2
d=14.5

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Answer 2

Given :-

C.S.A of cylinder = 957cm²

height = 21 cm

C.S.A = 957

=> 2πrh = 957

=> 2×22/7×r×21 = 957

=> 132×r = 957

=> r = 957÷132

=> r = 7.25

radius of the cylinder = 7.25cm

Diameter = 2r = 2×7.25 = 14.5 cm