alleryसीता एक काम 30 दिवसांत करते. सीता आणि तारा मिळून ते काम 20 दिवसांत करतात. एकट्या ताराला लागणारा वेळ:
A40 दिवस
B45 दिवस
C50 दिवस
D60 दिवस
Answer & Solution
Correct answer: D. 60 दिवस
Tara चा दर 1/20 - 1/30 = 1/60 आहे, म्हणून तिला 60 दिवस लागतात.
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