alleryA અને B ની કાર્યક્ષમતા 4:5 ના ગુણોત્તરમાં છે અને બંનેને સાથે મળીને 20 દિવસ લાગે છે. A ને એકલા કેટલા દિવસ લાગશે?
A40 દિવસ
B36 દિવસ
C50 દિવસ
D45 દિવસ
Answer & Solution
Correct answer: D. 45 દિવસ
કુલ કામ 9 એકમ x 20 દિવસ = 180 એકમ છે, અને A દરરોજ 4 એકમ કામ કરે છે, તેથી 45 દિવસ લાગે.
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