The perimeter of a rectangle is 200 meters. The breadth is \(\frac{3}{7}\) part of the length.What is the length ?

A 30

B 50

C 60

D 70

Correct Answer: Option D

Let the breadth is 3x and the length is 7x, so perimeter is 2(7x+3x) = 200 or 20x = 200 so x = 10 nw length is 7x = 7 \( \times \)10 = 70 meters

কিন্তু ধরি, প্রস্থ এবং দৈর্ঘ্য = x এর \(\frac{3}{7}\) বা, \(\frac{{3x}}{7}\) সুতরাং \(2(x + \frac{{3x}}{7}) = 200\)