Rs. 6,720
Rs. 8400
Rs. 10080
Rs. 10500
✅ The correct answer is D.
For every 100 hours that they pay for, there are 20 hours idle and therefore 80 hours worked.
So, for every 80 hours worked they will have to pay for 100 hours, again with 20 hours idle.
For every 100 hours that they pay for, there are 20 hours idle and therefore 80 hours worked.
So, for every 80 hours worked they will have to pay for 100 hours, again with 20 hours idle.
The idle time is 20/80 = 25% of the time worked.
So for this question they need 200 x 6 = 1200 hours of work.
Therefore they will have to pay for 1200 x 100/80 = 1500 hours.
This will cost them 1500 x Rs. 7 = Rs.10,500