The ratio of length to breadth of a rectangular field is 5 : 2. If the breadth is 240 m, find the length of the field.
Since the length and breadth are in the ratio 5:2.
Given, breadth = 240 m
⇒ 5 : 2 = length : 240 (both are equivalent ratios)
⇒ 5 : 2 = length : 2×120
⇒ length = 5×120 = 600
Therefore, length of the rectangular field is 600 m.