61.Find the volume , curved surface area and the total surface area of a cylinder with diameter of base 7 cm and height 40 cm.
A. 158 cm2 B. 957cm2
C.184 cm2 D.None
Answer:
Volume = ?r2 h = ((22/7)x(7/2)x(7/2)x40) = 1540 cm3. .
Curved surface area = 2?rh = (2x(22/7)x(7/2)x40)= 880 cm2 .
Total surface area = 2?rh + 2?r2 = 2?r (h + r)= (2 x (22/7) x (7/2) x (40+3.5)) cm2 = 957 cm2
