The ratio of the length of a school ground to its width is 5 : 2. If the width is 40m, then the length is = ?

A. 200m

B. 100m

C. 50m

D. 80m

Answer: Option B

Solution(By Examveda Team)

Length : Width
    5x   :: 2x
Width ⇒ 2x ⇒ 40m
                 x ⇒ 20m
∴ Length ⇒ 5 × 20 = 100m