Question

Rafiq exericed for 3/6 of an hour,while Rohit exericed for 3/4, of an hour, who exericed for a longer time

Answer 1

3/6 convert the denominator as 12
3/6=6/12
3/4=9/12
9/12 is greater than 6/12
so rohit exercised longer

Answer 2

ՏϴᏞႮͲᏆϴΝ :-

Rafiq exercised for $\large \frac{3}{6}$ hours.

And, Rohit excercised for $\large \frac{3}{4}$ hours.

Now, $\large \frac{3}{6} = \frac{3 × 2}{6 × 2} = \frac{6}{12}$

and, $\large \frac{3}{4} = \frac{3 × 3}{4 × 3} = \frac{9}{12}$

$\large \: \: \frac{9}{12} > \frac{6}{12} \: i.e, \: \frac{3}{4} > \frac{3}{6}$

Thus, Rohit excercised for a longer time.