Jatin runs a marathon of a km b hours. If he walks at a speed that is 50% of
Jatin runs a marathon of a km b hours. If he walks at a speed that is 50% of the speed at which he runs, then the time that he would take to walk 200 m is.
ab/200 hours
3a/6b hours
2b/5a hours
a/5b hours
100b/a hours