Landowner increased the length and the breadth of a rectangular plot by 10% and 20% respectively. Find the percentage change in the cost of the plot assuming land prices are uniform throughout his plot.
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26
Answer:
In such questions assume the length and breadth to be 100.
old length = old breadth = 100
As the prices of land are measured in terms of area rather than perimeter, we'll find the area and change in area would be change in prices.
Area = l * b = 10,000
New length = 110, new breadth = 120
New area = 13,200
Percentage change = [(new area - old area) / old area ] * 100
= [(13200-10000) / 10000] * 100
= 3200 / 100
= 32
So, the percentage change in cost is 32%
Step-by-step explanation:
Answered by
1
Step-by-step explanation:
Increased In length = 10%
Increased in Breadth = 20%.
Increase in area,
100 == 10% up length effect == 110 == 20% up breadth effect ==> 132.
%increased area = 32%.
As area increased was 32% so cost also increased as 32%.
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