Question

The length of a rectangle is $12cm$ and the width is $8cm$. If the length is greater by $2cm$, what should the width be so that the new rectangle have the same area as the first one?

• A. $6.8cm$
• B. $3.4cm$
• C. $1.5cm$
• D. $5.6cm$

Answer 1

Answer: (A)

$6.8cm$

The area of the first rectangle is $L\times W=12\times 8=96c{m}^2$
The new length is $12+2=14cm$
$14\times W=96$
$W=\frac{96}{14}=6.8cm$