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A person can row a distance of 4 km upst...

A person can row a distance of 4 km upstream in 1 hour 20 minutes and can row back to the starting point in just 24 minutes. How much time (in hours) will he take to row 13 km in still water? /
एक व्यक्ति धारा के विपरीत 4 किमी की दूरी 1 घंटा 20 मिनट में तय कर सकता है और अपने आरंभिक बिंदु तक केवल 24 मिनट में वापस पहुँच सकता है | स्थिर जल में 13 किमी की दूरी तय करने में उसे कितना वक्त (घंटे में) लगेगा ?

A

2

B

`3 1/2`

C

`3`

D

`2 1/2`

Text Solution

Verified by Experts

The correct Answer is:
A
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A person rows a distance of 3 ( 3)/(4) km upstream in 1(1)/(2) hours and a distance of 13 km downstream in 2 hours. How much time ( in hours) will the person take to row a distance of 90 km in still water ?

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A boat takes 80 minutes to 12 km upstream and 60 minutes to row 15 km downstream. How long will it take to row a distance of 36 km in still water? किसी नाव को धारा के प्रतिकूल 12 किमी जाने में 80 मिनट लगते हैं तथा धारा के अनुकूल 15 किमी जाने में 60 मिनट लगते हैं | स्थिर जल में इसे 36 किमी की दूरी तय करने में कितना समय लगेगा ?

A boat goes a distance of 4 km upstream in 2 hours and the same distance downstream in 20 minutes. How long will it take to go 10 1/2 km in still water? एक नाव 2 घंटे में 4 किमी धारा के प्रतिकूल जाती है और धारा के अनुकूल इतनी ही दूरी 20 मिनट में तय करती है | स्थिर जल में 10 1/2 किमी तक जाने में इसे कितना समय लगेगा ?

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