In a toy factory 200 wooden soils cylinders 7 cm long and 35 mm in diameter have to be painted. what is the total surface area in cm that needs to be painted

b) well because you get well

it's equivalent, so we can say that its equal.

let's call the denominator x and the numerador is 18 less then denominator, x - 18.

multiply

2.x = 5.(x - 18)

2x = 5x - 90

90 = 5x - 2x

90 = 3x

x = 90/3

x = 30

so: