The ratio of the radii of two car tyres is 1 : , If the area of the smaller tyre is 100 cm2, what is the area of the larger tyre?
Show answer & explanation
Correct answer: A
Explanation
The correct answer is option 1 i.e. 200 cm2.
Let the area of the larger tyre = A cm2
Radii ratio = 1 : √2
Smaller tyre area = 100 cm2
Area ratio = (1)2 : (√2)2 = 1 : 2
⇒ 100/A = 1/2
⇒ A = 200 cm2