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Q. In covering a distance of 30 km, Aleena takes 2 hours more than Kriti. If Aleena doubles her speed, then she would take 1 hour less than Kriti. Aleena's speed is:

Q. 30 किमी की दूरी तय करने में एलीना को कृति से 2 घंटे अधिक लगते हैं। अगर एलीना अपनी गति दोगुनी कर देती है, तो वह कृति से 1 घंटे कम समय लेगी। एलीना की गति है:

A

4 km/hr
4 किमी/घंटा
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B

5 km/hr
5 किमी/घंटा
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C

6 km/hr
6 किमी/घंटा
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D

7 km/hr
7 किमी/घंटा
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Solution

The correct option is B
5 km/hr
5 किमी/घंटा
Let the speed of Aleena be x km/hr.
30x302x=3
(By Doubling her speed, Aleena is able to save three hours.) Solving, x=5 km/hr

माना कि एलीना की गति x किमी/घंटा है।
30x302x=3
(अपनी गति को दोगुना करके, एलीना तीन घंटे बचाने में सक्षम है।) हल करने पर, x=5 किमी/घंटा

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