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  • Aptitude question

    Manish Goyal

    Member

    Updated: Oct 25, 2024
    Views: 1.6K
    At what time between 7 and 9 o'clock will the hands of a clock be in the same straight line but, not together?
    A. 5 min. past 7
    B. 5*(2 /11)min. past 7
    C. 5 *(3/11)min. past 7
    D. 5 *(5/11)min. past 7


    A watch which gains uniformly is 2 minutes low at noon on Monday and is 4 min. 48 sec fast at 2 p.m. on the following Monday. When was it correct?
    A 2 p.m. on Tuesday

    B 2 p.m. on Wednesday

    C 3 p.m. on Thursday

    D 1p.m. on Friday
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Replies

  • Morningdot Hablu

    Member • Jun 6, 2010

    hey goyal check out your option b,c,d put the "+"sign in the place of "*".
    i think 5+(5/11)min. past 7 is correct.
    because hour hand will suffer some distance from 7 when minute hand arive on 5.
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  • Manish Goyal

    Member • Jun 6, 2010

    no options are correct

    try it
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  • vishnu priya

    Member • Jun 6, 2010

    Think it will be straight in case of the first option!
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  • Manish Goyal

    Member • Jun 6, 2010

    @vishnu :-no it is not correct option

    @others Please give explanation along with answer
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  • sherya mathur

    Member • Jun 6, 2010

    solution:
    at 7 o'clock ,the minute hand will be on 12
    means minute hand and hour hand are 25 minute space apart
    so for being in the straight line the minute hand will have to move 30-25=5 minute
    as we know that 55 spaces are gained by 60 minutes
    therefore 5 minutes will be gained in=(60/55)x5
    =5.45 minute
    or 5+5/11 minute past seven
    so both hands will be in straight line but not together at 5+5/11 minute past 7
    hope this will be the right answer
    and gd explanation
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  • Morningdot Hablu

    Member • Jun 6, 2010

    sherya mathur
    solution:
    at 7 o'clock ,the minute hand will be on 12
    means minute hand and hour hand are 25 minute space apart
    so for being in the straight line the minute hand will have to move 30-25=5 minute
    as we know that 55 spaces are gained by 60 minutes
    therefore 5 minutes will be gained in=(60/55)x5
    =5.45 minute
    or 5+5/11 minute past seven
    so both hands will be in straight line but not together at 5+5/11 minute past 7
    hope this will be the right answer
    and gd explanation
    hey i tell the same thing as you said.
    so the option's are wrong.
    but goyal said it,s not.

    @goyal check out once more.
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  • Manish Goyal

    Member • Jun 6, 2010

    yes you are right and explanation is also correct



    what about 2nd question?
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  • sherya mathur

    Member • Jun 6, 2010

    solution for second:
    as the watch is 2 minute slow at monday noon and 4 minute 48 seconds fast at following monday at 2 pm
    means in (24x7+2)=170 hours watch fasts (2+4 min 48 seconds)=360+48=408 seconds
    there fore the equatio will be like this
    408 seconds fast will be in =170 hours
    1 '' '' ..........................=170/408 hours
    120 seconds(to cover 2 minute slow)=170x120/408
    = 50 hours
    so the watch will show right time after 50 hours
    and that time will be 2pm. on wednesday
    I think this solution should also be correct
    so option 'B' will be the right answer
    plz tell me
    am I correct or not?

    Regards
    sherya
    CE..........
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  • Manish Goyal

    Member • Jun 6, 2010

    @mohit sorry i didn't notice your answer .you were correct

    @shreya :-Yes you are right
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