Mr waheed is paid Rs.4420 for a total normal working hours of 170 hours in a month. He is paid twice the rate per hour for overtime work. Mr waheed received Rs.6500 as salary last month. how many hours of overtime did he work?

Answer 1

4420/170 is the normal hourly rate.
If there were x overtime hours, then

4420/170 * (170+2x) = 6500
x = 40