Question

plz help to solve this question​

Answer 1

Michael finished it in 1/12 hrs
And vaibhav finished it in 3/4 hrs
So, first we will see who did it faster
We take LCM of the denominators
We get LCM= 12
3/4= 9/12
Since 9>1,
9/12>1/12
➡️ 3/4>1/12
So, vaibhav took more time to do it
Now, we subtract to see the fraction
So, 3/4-1/12= 9-1/12= 8/12= 2/3
So, vaibhav worked longer then Michael by 2/3 hrs