What is the length of a rectangle if its area is 4800cm and width is 60cm?

If you know the area of the rectangle and its length, then you can find out from the formula
S = a * b, where a is the width of the rectangle, b is the length of the rectangle, S is the area of the rectangle.
From this formula, it is necessary to express the length of the rectangle. To do this, divide the area of the rectangle by the width of the rectangle:
b = S: a,
b = 4800: 60 = 80 (cm).
Answer: 80 cm.