A rectangle has a perimeter of 52 cm and one of its sides is 20 cm. What is its area?
Answer & explanation
Correct answer: option 3
The correct answer is Option (3) → 120 cm2
The perimeter of a rectangle is \(2(l+b)\), so the two adjacent sides add up to half the perimeter.
Sum of adjacent sides \(=52\div2=26\) cm
Other side \(=26-20=6\) cm
Area \(=20\times6=120\) cm2