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Pandey Ji

· started a discussion

· 1 Months ago

expalin (Question: 197509.0 )

explain this line- time to gain 55min=60min

Question:
At what time are the hands of clocks together between 6 and 7 ? 
Options:
A) 32 \(\cfrac{8}{11}\) minutes past 6
B) 32 \(\cfrac{5}{7}\) minutes past 6
C) 30 \(\cfrac{8}{11}\) minutes past 6
D) None of these
Solution:
Ans: (a)


Knowledge Expert

· commented

· 1 Months ago

Dear student

In 1 minute, Minute hand covers 6° and Hour hand covers 1/2°. Therefore, Relative Velocity = 6 – 1/2 = 5 ½,° per minute.
Alternately, in 1 hour, the minute hand covers 60 minute divisions whereas the hour hand covers 5 minute division.Relative Speed = 60 – 5 = 55 minutes per hour.
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