What will be the earnings of a worker at Re. 0.55 per hour when he takes 140 hours to do a volume of work for which the standard time allowed is 200 hours?

The plan of payment of hours is on a sliding scale as follows:

Within the fi rst 10% saving in the standard time – bonus is 40% of the time saved Within the second10% saving in the standard time – bonus is 50% of the time saved Within the third 10% saving in the standard time – bonus is 60% of the time saved Within the fourth 10% saving in the standard time – bonus is 70% of the time saved