a)The surface area that needs to be painted is 122.54 in²
b)The number of can of paint required to paint 122.54 in² is 4 cans.
c) The cost of painting required s surface area is a $142.
How to determine surface area of a cylinder.
The Can is cylindrical
Given that
h = 5 in, r = 3 in
a) Surface area to be painted = curved surface area + area of top
S.A = πr² + 2πrh
= πr(r + 2h)
= 3.142 * 3(3 + 2(5))
= 122.54 in²
The surface area that needs to be painted is 122.54 in²
b) Given that 1L can of paint covers 30 in²
The number of can of paint required to paint 122.54 in² is
= 122.54/30
= 4 cans of 1L each.
The number of can of paint required to paint 122.54 in² is 4 cans.
c) Given that costs per can is $35
4 cans cost 4 * 35
= approx $142 to paint.
The cost of painting required s surface area is a $142.