CBSE BOARD XII, asked by Adityakumar642548, 8 months ago

Rajeev and Sanjeev are too close friends. Rajeev's watch gains 1  minute in an hour and Sanjeev's watch loses 2 minutes in an hour. Once they set both the watches at 12.00 noon, with my correct watch. When will the two incorrect watches of Rajeev and Sanjeev show the same time together?​

Answers

Answered by ʙᴇᴀᴜᴛʏᴀɴɢᴇʟ
16

Explanation:

Rajeev's watch gains 1min in an hour

⇒ Speed of Rajeev's watch =61min/hr

Sanjeev's watch loses 2min in an hour

⇒ Speed of Sanjeev's watch =58min/hr

Relative velocity of Rajeev's watch wrt Sanjeev's watch =(61−58)=3min/hr

To show the same time wrt to each other the Rajeev's watch has to make up 12 hrs wrt to Sanjeev's watch

Time take to make up this 12 hrs (or 12×60 min) =(12×

3

60

)=12×20 hrs =24×10 hrs =10 days

The answer is option B.

Answered by aarohi2493
14

Answer:

,

Explanation:

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