Let the speed of the boat in still water be x km/h and speed of current be y km/h. Then, x - y = 12 (upstream), x + y = 18 (downstream). Adding both equations: 2x = 30 → x = 15 km/h. Answer: a) 15 km/h.
How is M related to N?
Who is mother of S?
Who is the grandmother of S?
How is E related to U?
A and Z are siblings. B has two children and he is son of Y, who is father-in-law of C. C has only one son. Z is not granddaughter of Y. How is A relate...
Which of the following is definitely false?
How is T related to Z?
Who among the following is the mother of M?
How is J related to G?
If Radhika is the wife of Geet and Jayesh is married to Kaveri then how is Radhika related to Kaveri?
