Question

Find Total surface area & curved surface
area of a cylinder if it's diameter is 70cm
height is 35cm.​

Answer 1

Answer:

curved surface area of cylinder =2×22/7×35×35= 7700

total surface area = 2×22/7× 35 (35+35)=15400

Answer 2

Answer:

TSA of cylinder =

$2\pi \: r \: h$

Radius = 70/2 = 35cm.

Height = 35cm.

$2 \times \frac{22}{7} \times 35 \times 35$

= 7700 cm square (cm2)

CSA of cylinder = 2 pi r (r+h)

= 2 ×22/7 × 35 (35+35)

= 2×22/7 × 35 × 70

= 15,400 cm2

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