A cylindrical tank has radius 21 m and height 3 m. What is its volume? (Take pi = 22/7.)
Answer and explanation
Correct answer: B. 4158 m3
- Step 1: Volume = pi x r^2 x h = 22/7 x 21 x 21 x 3. Step 2. = 4158 m3. Answer: 4158 m3. Why not the others: 396 m3: That is 2 x pi x r x h, which is the curved surface area. 1386 m3: That divides by 3, which is the rule for a cone, not a cylinder. 8316 m3: That doubles the volume.
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