The area of rectangular piece of metal is 30 centimeters. The peice is 4 centimeters wide. How long is it

Question

asked Jul 11, 2020 139k views

2 Answers

Phdesign · Answer 1 · 2020-07-12T17:43:38+0000

Answer:

Explanation:

The formula of an area of a rectangle:

$A=w\cdot l$

w - width

l - length

We have

$A=30\ cm^2;\ l=4\ cm$

Substitute:

30=4w divide both sides by 4

$(30)/(4)=(4\!\!\!\!\diagup w)/(4\!\!\!\!\diagup)\\\\7.5=w\to w=7.5\ cm$