WAEC - Mathematics (2022 - No. 25)
The length of a rectangle is 10 cm. If its perimeter is 28 cm, find the area
30cm\(^2\)
40cm\(^2\)
60cm\(^2\)
80cm\(^2\)
Vysvětlení
perimeter = 2( length + breadth)
→ 28 = 2 (10+ b)
14 - 10 = b
b = 4
Area = length x breadth
10 x 4 → 40cm\(^2\)