A rectangular paper of width 8cm and length 22cm rolled along it width and a cylinder is formed.
On the above Intimation, Solve the question given below
The volume of cylinder is
Answer & explanation
Correct answer: option 4
The correct answer is Option 2: 98π cm3
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Height of cylinder = width = 8 cm
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Circumference of base = length = 22 cm
So,
2πr = 22
r = 22 / (2π)
Using π = 22/7:
r = 22 / (2 × 22/7)
r = 22 × 7 / 44
r = 3.5 cm
Step 2: Volume of cylinder
Volume = πr²h
= (22/7) × (3.5)² × 8
(3.5)² = 12.25
Volume = (22/7) × 12.25 × 8
= 308 cm³
Since 308=98×π308 = 98 × π308=98×π when expressed with π:
Volume = 98π cm³