The height of a circular cylinder is 20 cm and the radius of its base is 7 cm. Find:

(i) the volume

(ii) the total surface area.

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Solution

Volume = $π r^{2} h = \frac{22}{7} \times 7^{2} \times 20 = 3080 c m^{3}$
TSA= $2 π r (r + h) = 2 \times \frac{22}{7} \times 7 (20 + 7) = 1188 c m^{2}$

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The height of a circular cylinder is 20 cm and the radius of its base is 7 cm. Find: (i) the volume (ii) the total surface area.

Volume = πr2h=227×72×20=3080cm3 TSA=2πr(r+h)=2×227×7(20+7)=1188cm2

The height of a circular cylinder is 20 cm and the radius of its base is 7 cm. Find:

(i) the volume

(ii) the total surface area.

Volume = $π r^{2} h = \frac{22}{7} \times 7^{2} \times 20 = 3080 c m^{3}$
TSA= $2 π r (r + h) = 2 \times \frac{22}{7} \times 7 (20 + 7) = 1188 c m^{2}$