alleryदोन मित्र मिळून एका सभागृहाची स्वच्छता 8 दिवसांत करतात. त्यांपैकी एकाला एकट्याला 24 दिवस लागतात. दुसऱ्याला एकट्याला लागतील:
A12 दिवस
B14 दिवस
C10 दिवस
D16 दिवस
Answer & Solution
Correct answer: A. 12 दिवस
दुसऱ्याचा कामाचा दर 1/8 - 1/24 = 2/24 = 1/12 आहे, म्हणून 12 दिवस.
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