SSC SSC CHSL (Tier I & Tier II) Mock Test Series 2025 (New) Quantitative Aptitude Speed Time and Distance Boat and River
A boat goes 15 km upstream and 21 km downstream in 90 minutes. If the speed of the stream is 4 km/h, what is the speed of the boat in still water in km/h?
1
20
2
18
3
16
4
24