Question

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?​

Answer 1

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