math
posted by Nelly .
Calculate the lenght of a rectangle with area 350cm and breadth 50mm.

area=L*B
Length=area/breadth 
change 50mm to 5 cm

First change cm to mm
350 cm = 3500 mm
Area = L x W
3500mm = L(50mm)
Divide to solve for L 
Jane: the 350cm should be 350 cm^2, so in square mm, it would be 35000mm^2