Chapter 2: Units and Measurements

Q1. The length, breadth and height of a box are 25 cm, 15 cm and 8 cm. Find its volume with correct significant figures.

Solution

V = 25 × 15 × 8 = 3000 cm³
Since 25 has 2 sig figs: V = 3.0 × 10³ cm³

Q2. Convert 72 km/h to m/s.

Solution

72 × 5/18 = 20 m/s