Question
A boat goes 52 km in upstream in 4 hours and takes 3
hours to complete a distance of 21 km in downstream. Find the speed of boat in still water.Solution
Speed of boat in still water = (D + U)/2 Upstream speed (U) = 52/4 = 13 km/hr Downstream speed (D) = 21/3 = 7 km/hr Speed of boat in still water = (13 + 7)/2 = 20/2 = 10 km/hr
More Boats and streams Questions
52, 77, 127, ?, 302, 427
840, 2520, 630, 3150, ?, 3675
188    178    158   ?     88    38
5, 18, 39, 68, 105, ?
7, 176, ?, 378, 427, 452
...What will come in place of the question mark (?) in the following series?
22, 28, 37, ?, 72, 102
84, 63, ?, 283.5, 1701
64, 80, 120, 210, ?, 945
What will come in place of the question mark (?) in the following series?
40, 25, 30, 50, 105, ?
Which of the following number will replace the question mark (?) and complete the given number series?
4, 5, 12, 39, 160, ?
Relevant for Exams:
