1 . The effective speed of a boat travelling downstream is 20 kmph, whereas it is 10 kmph upstream. What is the speed of the stream current in kmph?
- A. 3
- B. 4
- C. 5
- D. none of these
View Answer | Discuss in Forum | Workspace | Report |
1 . The effective speed of a boat travelling downstream is 20 kmph, whereas it is 10 kmph upstream. What is the speed of the stream current in kmph?
View Answer | Discuss in Forum | Workspace | Report |