alleryત્રણ પેઇન્ટર એકલા કામ કરતાં અનુક્રમે 12, 15 અને 20 દિવસ લે છે. જો ત્રણેય સાથે મળીને કામ કરે, તો તે કામમાં સમય લાગે છે:
A3 દિવસ
B4 દિવસ
C5 દિવસ
D6 દિવસ
Answer & Solution
Correct answer: C. 5 દિવસ
દૈનિક કાર્ય (5 + 4 + 3)/60 = 12/60 = કામનો 1/5 ભાગ છે, તેથી 5 દિવસ.
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