The cylindrical vessel contains 49.896 litres of liquid. The cost of painting its curved surface area at 2 paise/sq cm 95.04. Find its total surface area.
Answer & explanation
Correct answer: option 2
V = 49.896 × 10000 cm3
$∴πr^2h=49896cm^3$
C.S.A = $\frac{9504}{2}cm^2$
∴ 2πrh = 4752
$⇒\frac{πr^2h}{2πrh}=\frac{49896}{4752}$
⇒ 21 and h = 36 T.S.A.
= 2πr(h + r) = 7524 cm2