Question

Steve, Peter, and Martha run around a circular park. They take $\frac{1}{3}$ hour, $\frac{2}{5}$ hours and $\frac{5}{12}$ hours to complete one round. If they ran in a sequential order, what is the total time (in minutes) taken by the three of them to complete one round?

• A. $69$ min
• B. $78$ min
• C. $72$ min
• D. $50$ min

Answer 1

The correct option is A $69$ min

Total time taken by Steve, Peter and Martha to complete one round of a circular park
$=(\frac{1}{2}+\frac{2}{5}+\frac{5}{12})h$
$=(\frac{1}{3}\times 60+\frac{2}{5}\times 60+\frac{5}{12}\times 60)$ min
$=(20+24+25)$ min
$=69$ min