Question

Find the reduced form of the ratio of the first quantity to second quantity.
$7$ minutes $20$ seconds, $5$ minutes $6$ seconds.

• A. 111:345
• B. 234:151
• C. 220:153
• D. None

Answer 1

The correct option is C 220:153

Reduced form of 7 min 20 sec, 5 min 6 sec is

firstly change minute in second

$$\begin{array}{c}\frac{7\times 60+20}{5\times 60+6}\\ =\frac{420+20}{300+6}\\ =\frac{440}{306}\\ =\frac{220}{153}=220:153\end{array}$$