Help me please. This is due at 12 tonight
2 answers:
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Answer:
Step-by-step explanation:
Height of the cylinder = 1.4 m
diameter of the cylinder = 1.1 m
Tublu has a full 2 litre tin of paint
Assume that the tank has an open top to allow the capturing of rainwater.
Also, Tublu does not need to paint the base of the tanks.
Tublu needs 250 ml to cover 1 m^2 of the tank body
Only the body of the tank is to be painted, so we find the perimeter of the tank body.
from basic circle mensuration, perimeter of the tank body =
where d is the diameter of the tank
==> 3.142 x 1.1 = 3.456 m
If we imagine that this perimeter of the tank body is spread out, it will form a rectangle with a height of 1.4 m from the base.
The area of this rectangle that will be formed = (perimeter of the cylinder body) x ( height of the cylinder)
==> 3.456 x 1.4 = 4.838 m^2
this area is the area of the tank that needs to be painted.
Now we convert the 250 ml to litre, we'll have
250 ml = 250 x 10^-3 litres = 0.25 litres
Since 250 ml or rather 0.25 litres of paint is needed to cover 1 m^2 area of the tank's body, then, we will need
==> 4.838 x 0.25 = <em>1.21 litres of paint</em>
Since Tublu has a full 2 litres tin of paint, and he needs 1.21 litres to cover the body of the tank, then we can say that <em>Tublu has more than enough paint to cover the tank surface in one layer coating.</em>