A square field is to be fenced on three sides. If the area of the field is 4900 m2, how many metres of fencing will be required?
Show answer & explanation
Correct answer: D
Explanation
The correct answer is option 4 i.e. 210.
Given, area of square = 4900
⇒ (Side)2 = 4900
⇒ Side = 70 m
Length to be fenced = 3 × Side
⇒ 3 × 70 = 210 m