Given W = D * U for an Effort-Driven Task

Multiple Choice

Given W = D * U for an effort-driven task.Assume an 8-hour workday.Initially,task R was assigned to Bob.Bob was expected to accomplish 32 hours of work in five days.Bob was expected to be 100% available to work on task R during the entire five days.However,Bob left the company and will be replaced by Sam.Sam's efficiency rate is 90%.If Sam is only 70% available,Sam will require __________ hours to complete task R.

A) 63
B) 40
C) 53.2
D) 50.8