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Choose the correct option.
A can do a certain work in 12 days. B is 60% more efficient than A. How many days does B alone take to do the same job?
A6 days.
B7.5 days.
C8 days.
D8 days.
Answer: Option (Login/Signup)
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TRICK
Ta:Tb = 100:(100-60)
Ta:Tb = 100:40=5:2
5x = 12
x = 12/5
no of days will b take is (12/5)*2=4.4
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