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  • Question
  • What time between 4 and 5 o'clock will the hands of a clock be at rightangle?


  • Options
  • A. 3 5/11
  • B. 4 5/11
  • C. 5 5/11
  • D. 6 5/11

  • Correct Answer
  • 5 5/11 

    Explanation

    this type of problems the formulae is
    (5*x + or -15)*(12/11)
    Here x is replaced by the first interval of given time
    here i.e 4
    Case 1 : (5*x + 15)*(12/11)
    (5*4 +15)*(12/11)
    (20+15)*(12/11)
    35*12/11=420/11=38 2/11 min.
    Therefore they are right angles at 38 2/11 min .past4
    Case 2 : (5*x-15)*(12/11)
    (5*4-15)*(12/11)
    (20-15)*(12/11)
    5*12/11=60/11 min=5 5/11min
    Therefore they are right angles at 5 5/11 min.past4.

  • Tags: Bank Exams, Bank PO

    Search Results


    • 1. At what time between 5.30 and 6 will the hands of a clock be at right angles?

    • Options
    • A. (43 + 5/11) min past 5
    • B. (43 + 7/11) min pats 5
    • C. 5
    • D. 7
    • Discuss
    • 2. Find at what time between 8 and 9 o'clock will the hands of a clock be in the same straight line but not together ?

    • Options
    • A. 100/11 min past 8
    • B. 120/11 min past 8
    • C. 90/11 min past 8
    • D. 80/11 min past 8
    • Discuss
    • 3. The reflex angle between the hands of a clock at 10.25 is

    • Options
    • A. 197 1/2
    • B. 167 1/2
    • C. 157 1/2
    • D. 187 1/2
    • Discuss
    • 4. How much does a watch lose per day, if its hands coincide ever 64 minutes?

    • Options
    • A. 32 8/11
    • B. 33 8/11
    • C. 34 8/11
    • D. 35 8/11
    • Discuss
    • 5. At what time between 7 and 8 o'clock will the hands of a clock be in the same straight line but,not together?

    • Options
    • A. (5 + 5/11 )min past 7
    • B. (6 + 5/11) min past 7
    • C. 7
    • D. 8
    • Discuss
    • 6. 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 ?

    • Options
    • A. 2 p.m on Tuesday
    • B. 2 p.m on Wednesday
    • C. 3 p.m on Thursday
    • D. 1 p.m on Friday
    • Discuss
    • 7. A watch gains 5 seconds in 3 minutes and was set right at 8 AM. What time will it show at 10 PM on the same day ?

    • Options
    • A. 10 : 27 : 41 AM
    • B. 8 : 51 : 04 AM
    • C. 9 : 45 : 15 PM
    • D. 10 : 23 : 20 PM
    • Discuss
    • 8. How many minutes does a watch lose per day, if its hands coincide every 64 minutes ?

    • Options
    • A. 36 7/9 min
    • B. 32 8/11 min
    • C. 34 3/11 min
    • D. 65 5/11 min
    • Discuss
    • 9. What is the ratio of 18 minutes to one hour ?

    • Options
    • A. 1/5
    • B. 3/4
    • C. 1/7
    • D. 3/10
    • Discuss
    • 10. An accurate clock shows 7 o'clock in the morning. Through how may degrees will the hour hand rotate when the clock shows 3 o'clock in the afternoon?

    • Options
    • A. 144º
    • B. 168º
    • C. 180º
    • D. 150º
    • Discuss


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