Question

If Nora jumps the rope $600$ times between $6:15$ A.M. and $6:25$ A.M., she takesto jump the rope once.

• A. $1$ sec
• B. $2$ sec
• C. $1.5$ sec

Answer 1

The correct option is A $1$ sec

Nora jumps the rope between $6:15$ A.M. and $6:25$ A.M.

$\therefore$ Nora jumps for $10$ mins = $60\times 10=600$ secs
$(\because 1$ min = $60\text{secs})$

So, Sara jumps the rope $600$ times in $600$ secs

Now, Time taken to jump once $=\frac{\text{Total time}}{\text{Total jumps}}=\frac{600}{600}=1$ sec

Therefore, Nora takes $1$ sec to jump the rope once.