Q.8 If volume of cylinder is 567 TT cm and height is 7cm then total surface area is
(i) 288Ttcm?
(ii) 188ftcm?
(iii) 1257cm?
(iv) 150Ticm?
Answers
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Step-by-step explanation:
given that:
h = 7cm
22/7×r²×7 = 567 cm³.
=> 22×r²=567
r²=567/22
r²= 25.7
:- r= 5.07
Now,
total surface area of a cylinder = 2 × 22/7 × r (h+r)
=> 2 × 22/7 × 5.07 (7 + 5.07)
= 223.08/7 (12.07)
= 2692.57/7
= 384.65
=> the total surface area of the given cylinder
= 384.65 cm²
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