Question

If the two rectangles $ABCD$ and $PSRQ$ are congruent with each other, then $a\times b=$

• A. $40$ sq. units
• B. $60$ sq. units
• C. $80$ sq. units

Answer 1

The correct option is A $40$ sq. units

The rectangles $ABCD$ and $PSRQ$ are congruent.
$\therefore$ the corresponding sides will have the same length.
$\Rightarrow AB=QR\Rightarrow b=5$ units
Similarly, the length of other side will also be the same.
$\Rightarrow AD=PQ\Rightarrow a=8$ units.
$\Rightarrow a\times b=8\times 5=40$ sq. unit.