The second option.
That is because
That is because
The density of a certain material is such that it weighs 9 kilograms for every 7 cubic feet of volume. Express this density in p
1 answer:
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Answer:
Cost = 616000 DHS per square centimetre.
Step-by-step explanation:
curved surface of a cylinder = 2rh
r = 7 cm
h = 1400 m = 140000 cm
The outer curved surface area of the cylinder = inner curved surface area of the cylinder
The inner curved surface of the cylinder = 2rh
= 2 x x 7 x 140000
= 2 x 22 x 1 x 140000
= 6160000
The inner curved surface of the cylinder is 6160000 square centimetre.
But, the cost of painting is at the rate of 10 DHS per square centimetre.
The inner curved surface of the cylinder = 6.16 x square centimetre.
cost of painting the inner curved surface area =
= 616000 DHS per square centimetre
The cost of painting the inner surface is 616000 DHS per square centimetre.
The general form of an equation is 
. Solving for (5+X)(5-X)=7 by multiplying the factors and subtratcting 7 on both sides gives the equation 
, so
A = 1
B = 0
C = -18
A = 1
B = 0
C = -18