Question

diameter of base of cylinder is 42 cm and height 10 cm find c.s.a​

Answer 1

Answer:

Diameter = 42, Height = 10

Radius (r) = 42/2 = 21

Curved Area of Cylinder = 2πrh = 2 × (22/7) × 21 × 10

= 1320 sq cm

Total Surface Area = 2πrh + 2πr²

= 1320 + [2 × (22/7) × 21²]

= 1320 + 2772

=4092 sq cm..

I hope it's help to uu❤✌️✌️

Answer 2

Answer ⤵️

Diameter of the cylinder= 42 cm

Radius of the cylinder= 42/2=21 cm

C.S.A of the cylinder= 2πrh

$2 \times \frac{22}{7} \times 21 \times 10 \\ = \frac{11}{7} \times 21 \times 10 \\ = 11 \times 3 \times 10 \\ = 330 \: \: {cm}^{2}$

So its C.S.A is 330 cm²

Step-by-step explanation:

please mark it Brainliest answer