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6 men and 8 women can complete a work in 10 days. 26 men and 48 women can finish the same work in 2 days. 15 men and 20 women can do the same work in - days.

 6 men and 8 women can complete a work in 10 days. 26 men and 48 women can finish the same work in 2 days. 15 men and 20 women can do the same work in - days.

A. 4 days

B. 6 days

C. 2 days

D. 8 days



 Let work done by 1 man in 1 day = m and work done by 1 woman in 1 day = b 

 Work done by 6 men and 8 women in 1 day = 1/10 

 => 6m + 8b = 1/10

 => 60m + 80b = 1 --- (1)

 Work done by 26 men and 48 women in 1 day = 1/2 

 => 26m + 48b = ½

 => 52m + 96b = 1--- (2)

 Solving equation 1 and equation 2. We get m = 1/100 and b = 1/200

 Work done by 15 men and 20 women in 1 day 

 = 15/100 + 20/200 =1/4

 => Time taken by 15 men and 20 women in doing the work = 4 days
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The telephone bill of a certain establishment is party fixed and partly varies as the number of calls consumed. When in a certain month 540 calls made the bill is Rs.1800. In another month 620 calls are consumed then the bill becomes Rs.2040. In another month 500 units are consumed due to more holidays. The bill for that month would be :

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