Question

Ratio of half an hour to $40$ minutes is

• A. $1:80$
• B. $1:20$
• C. $3:4$
• D. $4:3$

Answer 1

The correct option is C

$3:4$

Step:Explanation for correct option.

Option-$\mathrm{C}$:$(3:4)$

To find the ratio of half an hour to $40$ minutes, both the numbers must be in same units.

Converting half an hour in minutes, we get

$$\begin{gathered} \text{⇒ 1 h = 60 minutes} \\ \text{⇒Half an hour =}\frac{1}{2}\text{h=}\frac{1}{2}\text{×60=30 minutes} \end{gathered}$$

Now, Ratio of half an hour to $40$ minutes $=\frac{30}{40}=\frac{3}{4}=3:4$

Therefore,the ratio of half an hour to $40$ minutes is $3:4$

Hence, option-$\mathrm{C}$ is the correct answer.