Question

find the curved surface area of a right circular cylinder whose height is 13.5 cm and radius of its base is 7 cm. Find also its surface area

Answer 1

Curved surface area = 2 pi r h
= 2 × 22/7 × 7 ×13.5
=594cm^2

TSA of cylinder=2 pi r (h+r)
=2 × 22/7 × 7 (13.5+7)
=2 × 22 × 20.5
=902cm^2

Answer 2

Curved surface area of cylinder is 594 $cm^2$.

Total surface area of cylinder is 902  $cm^2$.

Step-by-step explanation:

Given:

Height h = 13.5 cm

Radius = 7 cm

Now,

Curved surface area of cylinder = 2πrh

                                                       = $2\times \frac{22}{7} \times13.5 \times 7$

                                                       = $2 \times 22 \times 13.5$

                                                      = 594 $cm^2$

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

                                                   = $2\times \frac{22}{7} \times 7(7+13.5)$

                                                   = $2\times 22 \times (20.5)$

                                                   = 902  $cm^2$