The ratio of length to the breadth of a rectangle is 3:2. Its area is 2400 m². What is the length of the field?

by

A. 10 m
B. 30 m
C. 60 m 
D. 80 m

🧠 Explanation (Math):

Given: L:B = 3:2; Area = 2400 m²
Step 1: Let L = 3k, B = 2k
Step 2: Area = L×B = 3k × 2k = 6k² = 2400
Step 3: k² = 2400/6 = 400 ⇒ k = 20
Step 4: Length L = 3k = 60 m
Final Answer: 60 m