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# A machine has a velocity ratio of 5. It requires a 50kg weight to overcome a 200...

### Question

A machine has a velocity ratio of 5. It requires a 50kg weight to overcome a 200kg weight. The efficiency is

A) 4%

B) 5%

C) 40%

D) 50%

E) 80%

### Explanation:

Efficiency = M.A x 100%

= $$\frac{200}{50}$$ x $$\frac{1}{5}$$ x 100

= 80%

## Dicussion (1)

• Efficiency = M.A x 100%

= $$\frac{200}{50}$$ x $$\frac{1}{5}$$ x 100

= 80%