allery15 कामगारांचा एक गट एक काम 30 दिवसांत पूर्ण करू शकतो. 10 दिवसांनंतर, आणखी 5 कामगार सामील होतात. उर्वरित कामासाठी लागतील:
A18 दिवस
B15 दिवस
C12 दिवस
D10 दिवस
Answer & Solution
Correct answer: B. 15 दिवस
शिल्लक काम 15 x 20 = 300 कामगार-दिवस आहे, आणि 20 कामगार ते 15 दिवसांत पूर्ण करतात.
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