If the relaxation and other allowances were 25% then the observed time would be

Question

The standard time of an operation has been calculated as 10 min. The worker was rated at 80%. If the relaxation and other allowances were 25% then the observed time would be                     

(a) 12.5 min                    (b) 10 min

(c) 8 min                         (d) 6.5 min