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Th boat goes 25 upstream 33 …

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Th boat goes 25 upstream 33 downstream in 8 hours it can also go 40 upstream and 77 in downstream in 15 hour find 5he speed ofstream and that of boat in still water

Posted by Disha Jain 6 years, 5 months ago

CBSE > Class 10 > Mathematics

2 answers

Akanksha Kumari? 6 years, 5 months ago

Let the speed of the boat in still water be x km/h and that of stream be y km/h. Speed of boat upstream =(x-y)km/h Speed of boat downstream = (x+y)km/h Case 1. When it goes 25 km upstream and 33 km downstream. Let the time be t1 and t2. t1= 25/ x-y t2 = 33/ x+y Thus 25/x-y + 33/x+y = 8 --------------(1) Similarly, 40/x-y + 77/ x+y = 15 --------(2) Now solve the above equations .

2Thank You

Pk . 6 years, 5 months ago

What 25 -33-40-77 is this kilometer

0Thank You

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