The area of a rectangular field is 3600 m2. If the field is 45 m long, what is its perimeter?
Show answer & explanation
Correct answer: D
Explanation
The correct answer is option 4 i.e. 250 m.
Given that, length of rectangle, L = 45 m
Area of rectangle = 3600 m2
Area of rectangle = L × B
And perimeter of rectangle = 2(L + B)
According to the given question,
L × B = 3600
⇒ 45 × B = 3600
⇒ B = 80 m
Now, perimeter of rectangle = 2(45 + 80)
⇒ 2 × 125 = 250
Hence the perimeter of rectangle is 250 m.