alleryA અને B ને 10 દિવસ, B અને C ને 15 દિવસ, A અને C ને 12 દિવસ લાગે છે. ત્રણેય સાથે મળીને કેટલો સમય લેશે?
A9 દિવસ
B6 દિવસ
C7.5 દિવસ
D8 દિવસ
Answer & Solution
Correct answer: D. 8 દિવસ
સંયુક્ત દરનું બમણું મૂલ્ય 1/10 + 1/15 + 1/12 = 1/4 છે, તેથી ત્રણેય સાથે મળીને દરરોજ 1/8 ભાગ કામ કરે છે.
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