If the side of a square is increased by 30% then the find the percentage increase its area. [ ]
a) 30%
b) 69%
c) 51%
d) 20%
Answers
Answered by
1
Answer:
option b) 69%
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Answered by
1
Answer:
b) 69%
Step-by-step explanation:
NOTE
- Area of square = a^2
Lets consider the side of the square be as 50
Area = 50 ^2
Area = 2500
Increase side by 30%
50 + 30%
=> 50 + 30% ( 50)
=> 50 + 15
=> 65
New area = 65^2 = 4225
%Increase in area=(Increase in area)×100
old area
=> ( New area - old area ) × 100
Old area
=>( 4225-2500) × 100
2500
= > 1,725 × 100
2500
=> 0.69 × 100
%Increase in area = 69%
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