MBA Exam

At his normal speed, Prashant can travel 18 miles downstream in a fast flowing stream in 9 hours less than what he takes to travel the same distance upstream. The time for the downstream trip would take 1 hour less than the upstream trip provided that he doubles his rate of rowing. What is the speed of the stream in miles/hr. ? DO not have OA. please explain the method

1) 6 2/3
2) 8 1/3
3) 8/3sqrt(10)
4) 6sqrt(5)

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MBA Other Question

Previously, the autorickshaw metres in Delhi showed 8 Rs for the first
900 m and then the reading increased by 35 paisa per 100 m. Recently,
after the increase in fares, the metres show 10 Rs for the first 900 m
and then the readings increase by 45 paisa per 100 m. What is the
second whole number value of the fare that will be common to both the
old and the new metres?

1) 64
2) 379
3) 127
4) 13.6
5) 102
Aasish and bali run towards each other P and Q respectively with respective speeds of 36Kmph and 45Kmph .After meeting each other if Aasish reaches Q in 5 hours ,in how many hours did bali reach P ??

1) 3hrs
2) 3(1/5)hrs
3) 4hrs
4) 8hrs