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1. The percentage increase in the area of a rectangle , if each of its sides is increased by 20%, is :
- A. 40%
- B. 40%
- C. 40%
- D. 40%
Answer: Option C
Explanation:
Let,
one side of Rectangular is 100 m
The other side of Rectangular is 200 m
So, Present Area is = 100X200=20000 m2
if increase 20% of both side of rectangular.
Then, one side of Rectangular is= 100 +
100
×
20
100
= 120 m
Other side of Rectangular is = 200 +
200
×
20
100
= 240 m
After increasing the Rectangular area is = 120× 240 = 28800 m2
increasing the Rectangular area is = 28800 - 20000 = 8800 m2
So, % of increasing area is =
8800
×
100
20000
= 44%
Ans: 44%.
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