Question

Find
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.
of the steel actually used was wasted in
12
making the tank.
12. you see the fra
(i) how much steel was actually used, if 1/12 of steal actually used was wasted in making the tank​

Answer 1

Step-by-step explanation:

i)Diameter of a cylindrical(closed) petrol tank=4.2 m

h=4.5 cm

CSA =

$2\pi \gamma h$

using formula u get

$59.4sq.m$

ii)

TSA=

$2\pi \gamma ( \gamma + h)$

using it we get,

$87.12$

metal wasted =1/2

Let the amount of steel used in making the tank=x

x-1/12=87.12

11x/12=87.12

x=12/11*87.12

x=95.04sq.m steel was used in actual while making such a tank.

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