anonymous
  • anonymous
A boat travels 12 km upstream and back in total time of 1 hr and 15 minutes. When there's constant current speed is 1.5 km/h, find speed of the boat in still water.
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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jamiebookeater
  • jamiebookeater
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baru
  • baru
\(t_1\): time taken for upstream travel \(t_2\):time taken for downstream travel speed of boat: s downstream speed: s+1.5 upstream speed s-1.5 \(t_1=12/(s-1.5)\\t_2=12/(s+1.5)\) \(t_1+t_2= 1hr15min\)
anonymous
  • anonymous
you calculated how to find speeds in downstream and upstream, but what about speed in still water?
baru
  • baru
i have not calculated anything...I have left the last step for you to solve. just substitute \(t_1~and~t_2\) into the last equation. solve for "s" s is the speed of boat in still water

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anonymous
  • anonymous
Right. Thanks a lot for the help! :)

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