Answer:
Since curved surface area of a cyclinder = 154 cm2 [given]
Total surface area of cyclinder = 3 × curved surface area
2πrh + 2πr2 = 3 × 154
154 + 2πr2 = 462
2πr2 = 462 - 154 = 308
r2 = 308 × 7 / 2 × 22 = 49
r = 7 cm
Now, 2πrh = 154
2 × 22 / 7 × 7 × h = 154
h = 154 / 44 = 3.5 cm
∴ Volume of cyclinder = πr2h
= 22 / 7 × 7 × 7 × 3.5 = 539 cm3
