alleryKiran is three times as efficient as Lata, who alone needs 60 days. Together they need
A18 days
B12 days
C15 days
D20 days
Answer & Solution
Correct answer: C. 15 days
Lata does 1/60 and Kiran 3/60 per day, total 4/60 = 1/15, so 15 days.
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