• # question_answer 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 minC) 8 min               D) 6.5 min

Observed time $=\frac{\text{Standard}\,\,time\times 10}{Rating\,\,of\,\,\text{worker}\times (100+%allowance)}$ $=\frac{10\times 100}{0.8\times (100+25)}=10\,\min .$