Question

Eight specimens require 1.2 ml of water to culture. Which of the following gives the amount of water required by each specimen if they all need the same amount of water?

• A. 0.11 ml
• B. 0.12 ml
• C. 0.15 ml
• D. 0.16 ml

Answer 1

The correct option is C 0.15 ml

Eight specimens require 1.2 ml of water.

To find the unit rate, we have to divide the total amount of water required by the number of specimens.

Water required for each specimen = 1.2 $÷$ 8


$$\begin{array}{c}0.15\\ 81.2\\ -\underset{–}{8}-2\\ 404\\ -\underset{–}{40}0\\ 0\end{array}$$

= 0.15

Hence, the water required by each specimen = 0.15 ml.