The figure is made up of 4 identical rectangles, J, K, L and M. The perimeter of rectangle J is 150 cm.
- What is the breadth of rectangle K?
- Find the area of rectangle L.
(a)
Rectangles J, K, L and M are identical.
Breadth of Rectangle J = 1 u
Length of Rectangle K = 2 u
Perimeter of Rectangle J
= 1 u + 1 u + 2 u + 2 u
= 6 u
6 u = 150
1 u = 150 ÷ 6 = 25
Breadth of Rectangle K = 25 cm
(b)
Length of Rectangle L
= 2 u
= 2 x 25
= 50 cm
Area of Rectangle L
= 50 x 25
= 1250 cm
2 Answer(s): (a) 25 cm; (b) 1250 cm
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