Find the curved surface area and total surface area of a cylinder, the

1.	Find the curved surface area and total surface area of a cylinder, the diameter of whose base is 7 cm and height is 60 cm.
Answer» We have, Diameter of cylinder = 7 cm So, Radius of cylinder = 7/2 cm Height of cylinder = 60 cm By using the formula, Curved surface area of cylinder = 2πrh = 2 × 22/7 × 7/2 × 60 = 1320 cm² Total surface area of cylinder = 2πr (h+r) = 2 × 22/7 × 7/2 (60 + 7/2) = 22 (127/2) = 1397 cm²

Find the curved surface area and total surface area of a cylinder, the diameter of whose base is 7 cm and height is 60 cm.

Answer»

We have,

Diameter of cylinder = 7 cm

So, Radius of cylinder = 7/2 cm

Height of cylinder = 60 cm

By using the formula,

Curved surface area of cylinder = 2πrh

= 2 × 22/7 × 7/2 × 60

= 1320 cm²

Total surface area of cylinder = 2πr (h+r)

= 2 × 22/7 × 7/2 (60 + 7/2)

= 22 (127/2)

= 1397 cm²