Question

Reduce the given ratio to its simplest form:

$\text{2 hours : 1 hour 20 minutes}$

• A. 3:2
• B. 2:3
• C. 3:9
• D. 9:4

Answer 1

The correct option is A 3:2

The given ratio is 2 hours : 1 hour 20 minutes

Converting all the quanitities to the same unit we will get

$\Rightarrow$ 2 hours = 120 minutes ($\because$ 1 hour = 60 minutes)

and 1 hour 20 minutes = 60 + 20 = 80 minutes

Hence 2 hours : 1 hour 20 minutes $\to$ 120 minutes : 80 minutes

$\Rightarrow$ 120 minutes : 80 minutes = 3 : 2