Question

Find the ration of the second quantity to the first.

(2) 15 seconds, 1 min 15 sec.

Answer 1

First, we have to convert the quantities to the same unit.
1 min = 60 s
⇒ 1 min 15 s = 60 s + 15 s = 75 s

∴ Ratio of the second quantity (75 s) to the first quantity (15 s)$=\frac{\mathrm{Second}\mathrm{quantity}}{\mathrm{First}\mathrm{quantity}}$

$$\begin{gathered} =\frac{75}{15} \\ =\frac{75÷15}{15÷15} \\ =\frac{5}{1} \\ =5:1 \end{gathered}$$