# How to find the time knowing the work and power: N = 75 kW, A = 540 MJ, t -?

October 13, 2021 | education

| The power of any body can be expressed by the formula:

N = A / t, where N is the power (N = 75 kW = 75 * 10 ^ 3 W), A is the total work done by the body (A = 540 MJ = 540 * 10 ^ 6 J, t is the time during which the work (s) was performed.

Let’s express and calculate the running time:

t = A / N = (540 * 10 ^ 6) / (75 * 10 ^ 3) = 7200 s = 2 hours.

Answer: The working time is 2 hours.

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