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A boat can travel with a speed of 13 km/hr in still water. If the speed of the stream is 4 km/hr, find the time taken by the boat to go 68 km downstream.

12 hours
23 hours
34 hours
45 hours

Answer:- 1

Explanation:-

Solution:

\begin{aligned} Speed downstream \\ = (13 + 4) k m / h r \\ = 17 k m / h r \\ Time taken to travel 68 k m downstream \\ = \frac{68}{17} h r s \\ = 4 h r s \end{aligned}

$\eqalign{ & {\text{Speed}}\,{\text{downstream}} \cr & = \left( {13 + 4} \right)\,km/hr \cr & = 17\,km/hr \cr & {\text{Time}}\,{\text{taken}}\,{\text{to}}\,{\text{travel}}\,68\,km\,{\text{downstream}} \cr & = \frac{{68}}{{17}}\,hrs \cr & = 4\,hrs \cr}$

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", "dateCreated": "7/24/2019 10:09:12 AM", "author": { "@type": "Person", "name": "Nitin Sir" } }, "suggestedAnswer": { "@type": "Answer", "text": "

Solution:

\begin{aligned} Speed downstream \\ = (13 + 4) k m / h r \\ = 17 k m / h r \\ Time taken to travel 68 k m downstream \\ = \frac{68}{17} h r s \\ = 4 h r s \end{aligned}

$\eqalign{ & {\text{Speed}}\,{\text{downstream}} \cr & = \left( {13 + 4} \right)\,km/hr \cr & = 17\,km/hr \cr & {\text{Time}}\,{\text{taken}}\,{\text{to}}\,{\text{travel}}\,68\,km\,{\text{downstream}} \cr & = \frac{{68}}{{17}}\,hrs \cr & = 4\,hrs \cr}$ ", "dateCreated": "7/24/2019 10:09:12 AM" } }

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