A man does a given amount of work in 10 sec. Another man does the same amount of work in 20 sec. The ratio of the output power of first man to the second man is

Man excrete small amount of

In man the amount of blood is

In man the amount of blood is

In man the amount of blood is

A man takes large amount of protein. He is likely to excrete more amount of

A man takes large amount of protein. He is likely to excrete more amount of

A body of mass m kg lifted by a man to a height of one metre in 30 sec . Another man lifted the same mass to the same height in 60 sec . The work done by them are in the ratio.