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A motor boat whose speed is 18km/h in still water takes 1hour more to go 24 km up stream than to return downstream to the same spot. Find the speed of the stream

Posted by Umashankar Sharma 5 years, 8 months ago

CBSE > Class 10 > Mathematics

2 answers

Vipin Kumar 5 years, 8 months ago

therefore speed of stream is 6 km/hr

1Thank You

Vipin Kumar 5 years, 8 months ago

let the speed of stream X kilometre per hour therefore speed in upstream will x km per. and stream in downstream will be equals to 18 + x km per. time taken to go upstream = to distance upon speed will be equal to 24 upon (18-x) hours. similarly time taken to go downstream will be equals to 24 upon 18 - X hours. ATQ: (24/18-x) - (24/18+x) = 1 24(18 + x) - 24(18-x) = (18-x)(28+x) x square+ 48x-324 using quadratic formula x=-48+ under root48 square + 1296 -48 + 60 6

2Thank You

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