Last Updated On [03-11-2023]
The length and breadth of a rectangle are deficited by 5% and 7% respectively. Find the error % in area of the rectangle.
a)
11.65%
b)
88.35%
c)
35%
d)
65%
The length and breadth of a rectangle are deficited by 5% and 7% respectively. Find the error % in area of the rectangle.
a)
11.65%
b)
88.35%
c)
35%
d)
65%
Question ID - 55691 :-
The length and breadth of a rectangle are deficited by 5% and 7% respectively. Find the error % in area of the rectangle.
a)
11.65%
b)
88.35%
c)
35%
d)
65%
|
The length and breadth of a rectangle are deficited by 5% and 7% respectively. Find the error % in area of the rectangle. |
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|
a) |
11.65% |
b) |
88.35% |
c) |
35% |
d) |
65% |
Let the length and breadth of rectangle be 
and 
respectively.
∴ Area=
Length and breadth after deficite by 5% and 7% respectively are 
New area = 
∴ Area deficited = 
∴ % of area decreases=
Alternative Method (Using corollary (2) of T-1):
As dimension of rectangle deficited by 5% and 7% respectively
∴ % decrease in area = 5+7
Next Question :
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A student has to score 15% marks to get through. If he gets 80 marks and fails by 70 marks, the maximum marks set in the examination and passing marks are respectively |
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|
a) |
(1000, 150) |
b) |
(1500, 225) |
c) |
(800, 120) |
d) |
(600, 90) |
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