# A bicycle can put out 4,400 J of work. How much work input is needed for the bicycle to reach 70% efficiency?

## Question

## Solution 1

To determine the work input needed for the bicycle to reach 70% efficiency, we can use the formula:

Efficiency = (Work output / Work input) * 100

Given that the bicycle can put out 4,400 J of work and the desired efficiency is 70%, we can rearrange the formula to solve for the work input:

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