Classmates 2

Classmates Peter, Vlado, and Michael arrived late to school. Peter was 1/4 hour late, Vlado was 2/8 hours late and Michael was 4/16 hours late. How many minutes late was each of them?

Correct answer:

p =  15 min
v =  15 min
m =  15 min

Step-by-step explanation:

$$\begin{gathered} 1h=60min \\ \frac{1}{4}=\frac{2}{8}=\frac{4}{16} \\ p=60\cdot \frac{1}{4}=\frac{60\cdot 1}{4}=\frac{60}{4}=15\text{min} \end{gathered}$$

$v=60\cdot \frac{2}{8}=\frac{60\cdot 2}{8}=\frac{120}{8}=15\text{min}$

$m=60\cdot \frac{4}{16}=\frac{60\cdot 4}{16}=\frac{240}{16}=15\text{min}$

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