Boats and Streams - Shortcuts & Tricks for Placement Tests, Job Interviews & Exams

Описание: Crack the quantitative aptitude section of Placement Test or Job Interview at any company with shortcuts & tricks on Boats and Streams. Extremely helpful to crack entrance exams like MBA, Banking – IBPS, SBI, UPSC, SSC, Railways etc.

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0:00 Quantitative Aptitude
0:45 FORMULA
5:59 What will be the boat's speed in still water and speed of river, if the boat takes 12 hours to row 48 km upstream and 8 hours to row the same distance downstream?
9:13 Simran takes twice as long to swim up as to swim down the river and has a speed of 12 km/hr in still water. What is river's speed?
11:27 it takes P 1 hour to row to a place and to come back. If the river is running at 2.4 km/hr and P has a speed of 12 km/hr in still water, what distance is the place from P's starting point?
15:10 An ocean current flows at a rate of 1.5 km/hr. A shark can swim in still water at the rate 4.5 km/hr. What is the average speed for the entire distance travelled, if the shark swims from India to Australia and comes back?
18:31 Ajay takes 4 hours more while swimming upstream than downstream. His speed in still water is 10 km/hr. The speed of stream is 2 km/hr. What is the distance?
21:05 Raj swims 26km downstream in same time as 14 km upstream. What is his speed in still water if speed of stream is 3km/hr?
23:01 Ratio of Guddi's swimming speed in still water to the speed of river is 7:1. She swims 4.2 km up the river in just 14 min. How much time will Guddi take to swim 18.4 km down the river?
26:14 Find the ratio of swimming speed of Raj in still water to speed of river, if ratio of time taken to go 10km upstream to time taken to go 10km downstream is 11:5?
28:43 km upstream. But he takes 6 hours to swim 36 km downstream and 24 km upstream. At what rate is the river flowing?