Question

Find the area of a rectangle whose length is $5xy$ cm and breadth is $8x{y}^2$ cm when $x=2$ and $y=3$.

• A. $4320c{m}^2$
• B. $4820c{m}^2$
• C. $3620c{m}^2$
• D. $3520c{m}^2$

Answer 1

The correct option is A $4320c{m}^2$

Given:
Length of the rectangle $=5xy$
Breadth of the rectangle $=8x{y}^2$

By substituting the value of x and y, we get:

Length of the rectangle $=5xy=5\times 2\times 3=30cm$
Breadth of the rectangle $=8x{y}^2=8\times 2\times 3^2=144cm$

Area of the rectangle = Length $\times$ Breadth
$=30\times 144=4320c{m}^2$