Question

A copy machine makes 28 copies per minute. How many copies does it make in 3 minutes and 45 seconds?

Answer 1

Convert minutes and seconds to minutes:

`\text{3 mins 45 seconds} \longrightarrow 3 (3)/(4) \text{mins}`


FInd 3 3/4 mins:

`\text{1 min} \longrightarrow 28 \text{ copies}`


`3 (3)/(4) \text{ min} \longrightarrow 28 * 3(3)/(4) \text{ copies}`


`3 (3)/(4) \text{ min} \longrightarrow 28 * (15)/(4) \text{ copies}`


`3 (3)/(4) \text{ min} \longrightarrow 105 \text{ copies}`

Answer: It can make 105 copies.