plz solve this :-(:-(
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Step-by-step explanation:
Length : 77cm
Inner radius : 4/2 = 2cm
Outer radius :4.4/2 = 2.2cm
CSA formula for Cylinder is 2*pi*r*h
(i) 2 * (22/7) * 2 * 77
= 4 * 22 * 11
= 968 cm squared
(ii) 2 * (22/7) * 2.2 * 77
= 1064.8 cm squared
(iii) TSA of given cylinder = CSA(i) + CSA(ii) + 2*Area of base
Area of base: pi*r1*r1 - pi*r2*r2
= 22/7 (2.2 squared- 2 squared)
= 22/7 (4.84 - 4)
= 22/7 (0.84)
= 2.74 cm squared
From the formula for finding TSA,
968 + 1064.8 + 2.74 = 2038.08 cm squared
These are the required answers!
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