A rectangle is 14 cm long and 10 cm wide . If the length is reduced by x cms and its width is increased also by x cms so as to make it a square, then its area changes by :
Created: 6 years ago |
Updated: 3 years ago
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Area = 14 × 10 = 140 sq.cm
New length = ( 14 - x)
New width = ( 10 + x)
14 - x = 10 + x
2x = 4
x = 2
New Area = ( 14 - 2) × ( 10 + 2) = 144
change is area = ( 144 - 140) sq.cm = 4 sq.cm
Md Azizur Rahman
Founder of Satt
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