Unit and Measurements | Unit and Measurements NEET Questions

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Topic Question Set

Q 1 :
The area of a rectangular field (in $m^{2}$ ) of length 55.3 m and breadth 25 m after rounding off the value for correct significant digit is: [2022]

$138 \times 10^{1}$
$1382$
$1382.5$
$14 \times 10^{2}$

1

2

3

4

(4)

Given, that, length $(l)$ $= 55.3 m$

Breadth $(b) = 25 m$

The area of rectangular field is, $A = l \times b = 55.3 \times 25$

$= 1382.5 m^{2} = 1.3825 \times 10^{3} m^{2} \approx 1.4 \times 10^{3} = 14 \times 10^{2} m^{2}$

Q 2 :
Taking into account of the significant figures, what is the value of 9.99 m – 0.0099 m? [2020]

9.9801 m
9.98 m
9.980 m
9.9 m

1

2

3

4

(2)

$9.99 - 0.0099 = 9.9801 m$

Least number of significant figures are 3. Hence, required answer will be 9.98 m.

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