Question

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

Answer 1

Answer:

The Lateral or Curved Surface Area of the cylindrical petrol storage tank is 59.4 m².

Step-by-step explanation:

Given, height = 4.5 m

Diameter = 4.2 then, Radius = 2.1 m

Lateral Surface Area = 2 × 22/7 × r × h

= 2 × 22/7 × 2.1 × 4.5

= 2 × 22/700 × 21 × 45

= 2 × 22/100 × 3 × 45

= 2 × 22/20 × 3 × 9

= 22/10 × 3 × 9

= 11/5 × 3 × 9

= 11/5 × 27

= 297/5 = 59.4 {ans}.

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