Question

a) 25.1 ml

Explanation:

Step1: Identify the scale division

The scale has markings from 20 - 30 and 30 - 40. The space between 20 and 30 is divided into 10 equal parts. So each small - division represents 1 mL.

Step2: Read the meniscus

The bottom of the meniscus (the curved surface of the liquid) is at the 5th small - division above 20 and a bit more. Estimating the extra part, we can say it is 0.1 mL above the 5th division. So the reading is 25.1 mL.

Answer:

25.1 mL