(C) Let the original length be $l$ and the original breadth be $b$. The original area is $A = l \times b$.The new length $l' = l + 0.05l = 1.05l$.The

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(C) Let the original length be $l$ and the original breadth be $b$. The original area is $A = l \times b$.The new length $l' = l + 0.05l = 1.05l$.The new breadth $b' = b - 0.04b = 0.96b$.The new area $A' = l' \times b' = (1.05l) \times (0.96b) = 1.008lb$.The change in area is $A' - A = 1.008lb - 1lb = 0.008lb$.The error percent in the area is $\frac{A' - A}{A} \times 100 = \frac{0.008lb}{lb} \times 100 = 0.8 \%$.

Competitive Quantitative Aptitude Mensuration Measurement of Area

Medium

In measuring the sides of a rectangle,one side is taken $5 \%$ in excess,and the other $4 \%$ in deficit. Find the error percent in the area calculated from these measurements. (in $\%$)

A
$2$
B
$1$
C
$0.8$
D
$0.6$

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Mensuration

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Measurement of Area

If the length of one side and the diagonal of a rectangle are $7 \text{ cm}$ and $25 \text{ cm}$ respectively,then find its perimeter (in $\text{cm}$).

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The hypotenuse and the semi-perimeter of a right triangle are $20\, cm$ and $24\, cm$,respectively. The other two sides of the triangle are

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In the adjacent figure,find the area of the shaded region in $cm^2$. (Use $\pi = 22/7$)

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How many bricks,each measuring $25\, cm \times 15\, cm \times 8\, cm$,will be required to build a wall $10\, m \times 4\, dm \times 5\, m$ if $\frac{1}{10}$ of its volume is occupied by mortar?

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In measuring the sides of a rectangle,one side is taken $5 \%$ in excess,and the other $4 \%$ in deficit. Find the error percent in the area calculated from these measurements. (in $\%$)

Similar Questions

If the length of one side and the diagonal of a rectangle are $7 \text{ cm}$ and $25 \text{ cm}$ respectively,then find its perimeter (in $\text{cm}$).

If the area of a square is equal to the area of a rectangle $6.4 \, m$ long and $2.5 \, m$ wide,then each side of the square measures (in $m$)

The hypotenuse and the semi-perimeter of a right triangle are $20\, cm$ and $24\, cm$,respectively. The other two sides of the triangle are

In the adjacent figure,find the area of the shaded region in $cm^2$. (Use $\pi = 22/7$)

How many bricks,each measuring $25\, cm \times 15\, cm \times 8\, cm$,will be required to build a wall $10\, m \times 4\, dm \times 5\, m$ if $\frac{1}{10}$ of its volume is occupied by mortar?

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