Arectangular playground has an area of 768 square meters. if the width of the rectangle is 32 meters, find the length.

The length is 24 because 768 is the are and to find area you would do length x width but in this case the width has already been told so you have:
32 X=768
so you do 768÷32= 24 so that's your answer sorry for such a long explanation which probably wasn't necessary but oh well!