Speed of boat in still water is 7km/hour Let the Speed of Stream be x Km/hour 36/(7+x) + 36/(7-x) = 21 24 = 49- x2 x = 5 km/hour Now, the speed of Boat for the journey from A to B to take time 108 minutes is Speed of boat = y km/hour , Speed of stream =5km/hour , Time = 108 minutes (y+5) = (36×60)/108 = 20km/hour y+5 = 20 y = 15 km/hour ∴ Speed of Boat must be 15 km/hour.
How is S related to B?
E is the son of A. D is the son of B. E is married to C. C is B’s daughter. How is D related to E?
Who is the wife of E?
How is S related to Z?
Answer the questions based on the information given below.
‘L@M’ means ‘L is the father of M’.
‘L&M’ means ‘L is the sist...
There are six persons, M, N, O, P, Q and R in a family. R is the paternal grandmother of M. O is the sister of Q. N is the father of O. M is the only so...
How D is related to E?
How is H related to son of M?
Introducing a woman, a man said, 'Her sister’s mother is the only daughter of my grandmother.' How is the man related to this woman?
How is S related to R, if T has only one daughter?