The ratio of the outer and the inner circumference of a circular path is 5 : 4. If the path is 50 meters wide, then what is the radius of the inner circle?
Show answer & explanation
Correct answer: C
Explanation
The correct answer is option 3 i.e. 200 metres.
Ratio of circumference = ratio of radius
Using the above concept;
the ratio of the outer and the inner radius = 5 : 4
Let the outer and inner radius be 5x and 4x
According to the question;
⇒ 5x - 4x = 50
⇒ x = 50
Radius of inner circle = 4x = 4 × 50 = 200 m