In a 1 km race, X beats Y by 20 seconds and Y beats Z by 10 seconds. If X beats Z by 240 m. The time taken by X to run 1 km is:
Answer & explanation
Correct answer: option 2
X : Y : Z
x : (x + 20) : (x + 30)
Same is the ratio of distance
Difference between X and Z = 240 is covered 30 seconds
Speed of Z = 8 m/s
Time taken to cover 1km = \(\frac{1000}{8}\) = 125 seconds
Time taken by X = 125 - 30 = 95 seconds