alleryP आणि Q मिळून एक शेड 6 दिवसांत बांधतात. P ला एकट्याला 10 दिवस लागतात. Q ला एकट्याला लागतील:
A18 दिवस
B12 दिवस
C15 दिवस
D20 दिवस
Answer & Solution
Correct answer: C. 15 दिवस
Q चा कामाचा दर 1/6 - 1/10 = 4/60 = 1/15 आहे, म्हणून 15 दिवस.
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