Question
A man swims downstream 60 km and upstream 36 km, taking
12 hr each time. Find the man’s rate in still water?  ÂSolution
Speed downstream = 60/12 = 5 km/hr Speed upstream = 36/12 =  3 km/hr Man’s rate in still water= (5 + 3) x ½ = 4 kmph
More Boats and streams Questions
152    142    122   ?     52    2
21, 37, 73, 137, ?, 381
What will come in place of the question mark (?) in the following series?
12, 13, 27, ?, 329, 1646
What will come in place of the question mark (?) in the following series?
325, 292, 262, 229, ?, 166
4, 4, 12, 60, ?, 3780
2807, 1400, 697, 346, 171, 84, 41, ?
254, ?, 1022, 1150, 1214, 1246
143 Â Â Â Â 119Â Â Â Â 107Â Â Â Â 101Â Â Â Â Â 98Â Â Â Â ?
204, 401, 640, ?, 1105, 1406
What will come in place of the question mark (?) in the following series?
60, 94, 184, 464, 1388, ?
