I know the answer is 130J, I just don\'t know how to get to it. Can someone plea

Question

I know the answer is 130J, I just don't know how to get to it. Can someone please explain the formula and procedure I need to use?

The energy flow per unit time per unit area (S) of an electromagnetic wave has an average value of 695 mW/m2. The wave is incident upon a rectangular area, 1.5 m by 2.0 m, at right angles. The total energy that traverses the area in a time interval of one minute is closest to:
130 J
160 J
190 J
220 J
250 J

I know the answer is 130J, I just don't know how to get to it. Can someone please explain the formula and procedure I need to use?

Explanation / Answer

The total energy that traverses the area in a time interval of one minute = energy flow per unit time per unit area * area of rectangle * time

=(695/1000)*(1.5*2)*60

= 125.1 J

closet to 130 J

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