Question

a mansion has 10 cylindrical pillars each having radios 50 cm and height 3.5m find the CSA of the pillars​

Answer 1

Answer:

$2\pi \times r \times h = csa \\ 2 \times \frac{22}{7} \times 50 \times 3.5 = csa \\ 2 \times 22 \times 50 \times0 .5 = csa \\ 1100 \times 1 = csa \\ csa = 1100 {cm}^{2}$

Answer 2

≡QUESTION≡

A mansion has 10 cylindrical pillars each having radius 50 cm and height 3.5m. Find the CSA of the pillars​.

                                                         

║⊕ANSWER⊕║

CSA of a cylinder =  2πrh

GIVEN

Radius = 50 cm

Height = 3.5 m

            = 3.5  * 100

            = 350 cm

CSA of a cylinder = 2 * 3.14 * 50 * 350

                              = 109900 cm²

CSA of 10 cylinders = 109900 * 10

                                  =1099000 cm²