railway RRB JE (CBT I + CBT II) Mock Test 2024 Quantitative Aptitude Speed Time and Distance Boat and River
If time upstream = n × time downstream and speed in still water is 'x' and speed of stream is 'y', then find x : y.
1
n/2
2
(n - 1) / (n + 1)
3
n / (n - 1)
4
(n + 1) / (n - 1)