Find the total surface area of a closed cylindrical petrol storage tank whose diameter 4.2 m and height 4.5 m.

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Solution

Given :

Radius( r ) : $\frac{4.2}{2} = 2.1 m$

height(h) = 4.5 m

We know total surface area of a cylinder is $= 2 π$ $r (h + r)$

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

$= 87.12$ $m^{3}$

The total surface area of the closed cylindrical petrol storage tank is $87.12$ $m^{3} .$

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Find the lateral curved surface area of a cylindrical petrol storage tank that is 4.2 m in diameter an 4.5 m high. How much steel was actually used, if $\frac{1}{12}$ of steel actually used was wasted in making the closed tank?

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1)the lateral surface area of a closed cylindrical petrol storage tank that is 4.2m in diameter and 4.5m high.

2)howuch steel was actually used,if 1/12 of the steel actually used was wasted in making the tank.

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Find the total surface area of a closed cylindrical petrol storage tank whose diameter 4.2 m and height 4.5 m.

Given :Radius( r ) : 4.22=2.1mheight(h) = 4.5 m We know total surface area of a cylinder is =2πr(h+r)=2×227×2.1(4.5+21)=87.12m3The total surface area of the closed cylindrical petrol storage tank is 87.12m3.

Given :

Radius( r ) : $\frac{4.2}{2} = 2.1 m$

height(h) = 4.5 m

We know total surface area of a cylinder is $= 2 π$ $r (h + r)$

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

$= 87.12$ $m^{3}$

The total surface area of the closed cylindrical petrol storage tank is $87.12$ $m^{3} .$