Calculate the potential energy possessed by a man holding a bag of 5kg at a height of 20cm. Take g=10m/s square. tnx.

i think the length is 12 and the width is 17

answer: 4  

the square root of 16 is 4. it is a very simple mathematic concept. a square root when a number multiplied by itself will result in a number. here, the number 16 comes when 4 is multiplied by 4. hence the square root of 16 is 4. you can always figure out a square root by the inverse operation of squaring.