alleryA ને એકલા B કરતાં 6 દિવસ ઓછા લાગે છે, અને સાથે મળીને તેઓ 4 દિવસમાં કામ પૂરું કરે છે. B ને એકલા કેટલા દિવસ લાગે?
A8 દિવસ
B9 દિવસ
C12 દિવસ
D10 દિવસ
Answer & Solution
Correct answer: C. 12 દિવસ
A = x અને B = x + 6 લેતાં, 1/x + 1/(x+6) = 1/4 પરથી x = 6 મળે છે, તેથી B ને 12 દિવસ લાગે છે.
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