Significant Figures in Product

Q.

The longest tape which can be used to measure exactly the lengths $175cm$, $450cm$ and $650cm$ is

1. $25cm$

2. $50cm$

3. $75cm$

4. $125cm$

Q. A body of mass $50g$ is moving with a velocity of $10m{s}^{-1}$. It is brought to rest by a resistive force of $10N$. Find the distance that the body will travel after the resistance force is applied.

1. $25km$
2. $50m$
3. $50cm$
4. $25cm$

Q. The length, breadth, and thickness of a block are given by l = 12 cm, b = 6 cm and t = 2.45 cm The volume of the block according to the idea of significant figures should be

1. 2 X 10² cm³
2. 1.763 X 10² cm³
3. None of these
4. 1 X 10² cm³