Question

Pls solve this problem for me for the free 5 points​

Answer 1

Answer:

1. 59.4m² 2. 95.04m²

Step-by-step explanation:

1. CSA = 2πrh

= 2*22/7*2.1*4.5

= 2*22*0.3*4.5

= 59.4 m²

2. TSA = 2πr(h+r)

= 2*22/7*2.1(4.5+2.1)

= 2*22*0.3*6.6

= 87.12 m²

Let the total amount of steel be x.

wasted steel = 1/12

used steel = 11/12

used steel * x = TSA

11/12*x=87.12m²

x = 87.12*12/11

x = 95.04 m²

Therefore, 95.04 m² amount of steel was actually used .

Hope it helps you.