All engineering phenomena deal with definite and measured quantities and so depend on the making of the measurement. We must be clear and precise in making these measurements. To make a measurement, magnitude of the physical quantity (unknown) is compared.
The record of a measurement consists of three parts, i.e. the dimension of the quantity, the unit which represents a standard quantity and a number which is the ratio of the measured quantity to the standard quantity.
If the length of rectangle `l = 10.5 cm,` breadth `b = 2.1 cm` and minimum possible measurement by scale `= 0.1 cm`, then the area is
Options:
(a) `22.0 cm^2`
(b) `21.0 cm^2`
(c) `22.5cm^2`
(d) `21.5cm^2`