Asked by Vince

A rectangle is 15cm x 12cm. If the length is reduced by R cm and its width is increased by R cm. Its area is reduced by 4cm^2.

Answers

Answered by Reiny
I assume you are looking for the value of R
Original rectangle has area 15x12 or 180 cm^2

new length = 15-R
new width = 12+R

so 180 - (15-R)(12+R) = 4

solve for R
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