Explanation : I. Ratio of speed = 1 : 2 : 4
If equal time is spent on each of these, then
ratio of distance = 1 : 2 : 4
So, Sachin runs twice the distance that he jogs.
Thus, I is true.
II. He runs at 8 km/hr and therefore walks at
2 km/hr.
Hence II is not true.
III. Ratio of speed = 1 : 2 : 4
Ratio of time = 2: 2 : 1
Ratio of distance = 2 x l: 2 x 2 : 4 x 1
= 2: 4: 4
If Sachin covers a total distance of 10 km,
then he
Thus, III is true.