The width of a rectangular lawn is 3 meters less than its length (l). Its perimeter is 42 meters.
(i) write an expression for the width of the rectangle in terms of the length
(1 mark)
(ii) write an equation in terms of l for the perimeter (1 marks)
(iii) calculate the area of the rectangle
Answers
Answered by
0
Answer:
l=12m and w = 9
Step-by-step explanation:
1) length =x
width = x-3
2) perimeter =2(l+b) =42
2(x+x-3) =42
3) 2(x+x-3) =42
2(2x-3)=42
2×2x-2×3=42
4x-6=42
4x=42+6=48
x=48÷4=12
l= x= 12m
b= x-3=12-3 = 9m
Similar questions