alleryकिरणची कार्यक्षमता लताच्या तिप्पट आहे, जिला एकटीला 60 दिवस लागतात. दोघांना मिळून लागतील:
A18 दिवस
B12 दिवस
C15 दिवस
D20 दिवस
Answer & Solution
Correct answer: C. 15 दिवस
लता दररोज 1/60 आणि किरण 3/60 काम करतो, एकूण 4/60 = 1/15, म्हणून 15 दिवस.
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