An body builder does 15 Joules of useful work from every 60 Joules of food energy which he takes. His efficiency will be

An body builder does 15 Joules of useful work from every 60 Joules of

1.	An body builder does 15 Joules of useful work from every 60 Joules of food energy which he takes. His efficiency will be
A.	0.15
B.	0.25
C.	0.3
D.	0.35
Answer» C. 0.3