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CBSE Class 9 Answered

solve a question on perimeter & area of rectangles
Asked by ashwati | 20 Dec, 2008, 10:40: PM
answered-by-expert Expert Answer

1. let the breadth of the rectangle be a, then its length will be 3a.

perimeter will be 8a.

side of square 625 = 25

then 8a = 4*25 = 100

a = 12.5

area of the rectangle = 3a2 = 3 (12.5)2 = 468.75

 

2.initially the side be a then area wil be a2 .

finally side is a/2 then area will be a2/4

so %reduction in area is 75%.

Answered by | 20 Dec, 2008, 11:05: PM

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