Question

4. Find
A the lateral or curved surface area of a closed cylindrical petrol storage tank
4.2 m in diameter and 4.5 m high.
(i) how much steel was actually used, if of the steel actually used was wa
making the tank.​

Answer 1

Step-by-step explanation:

Hey mate

Given Diameter=4.2

Height=4.5

TO FIND TSA

LSA

Solution LSA=CSA

To cover the whole cylinder we have to find its TSA

TSA of cylinder= 2*22/7*r(h+r)

Radius=Diameter/2

Radius=4.2/2

r=2.1

TSA.

$2 \times \frac{22}{7} \times \frac{21}{10} (4.5 + 2.1)$

TSA = 2178/25 ${m}^{2}$

LSA =2*22/7*r*h

LSA=

$2 \times \frac{22}{7} \times \frac{21}{10} \times \frac{45}{10}$

LSA=1485/25 ${m}^{2}$

Hope this will help u

And plzz

$\huge\underline\red{BRAINLIST}$$\huge\blue{PLEASE}$