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% |

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% |

1 Answer

127 votes

** **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

127 votes

127