a rectangle has 20cm and it's length and 200sq.cm as its area . If the area is increased to 1 1/5 times the original area by increasing its length only then the perimeter of the rectangle so formed is _________?
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Answer:
Length of rectangle = 20 cm
Area of rectangle = 200 sq cm
New area = 11/5 × 200 = 440 sq cm
According to que.
Breadth remain unchange
Hence
Area = 200
L × B= 200
20 × B = 200
B = 200/20
B = 10 cm
Now new area = 440
l × B = 440
l × 10= 440
l = 440/ 10
l = 44 cm
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