alleryदेव हा ईशापेक्षा 50% अधिक कार्यक्षम आहे, जी एकटी एक काम 30 दिवसांत पूर्ण करते. देवाला एकट्याला लागतील:
A15 दिवस
B45 दिवस
C25 दिवस
D20 दिवस
Answer & Solution
Correct answer: D. 20 दिवस
देवचा दररोजचा दर 1.5 x 1/30 = 1/20 आहे, म्हणून त्याला 20 दिवस लागतील.
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