The figure below is made up of 5 identical rectangles. The perimeter of each rectangle is 48 cm. Find the length of AD.
Solution:
Observe the figure carefully. Assume width of rectangle = u, then length of rectangle will be 3u.
Perimeter of rectangle = u + 3u + u + 3u = 48, or u = 6
Length of AD = u + 3u + u = 5u = 40 cm.
No comments:
Post a Comment