C with his 200% efficiency, can complete 25% of certain work in 12 days. B is 20% more efficient than C. A with 75% efficiency can complete the work in same days as B. If A and B together finish the same work and A gets Rs 10400, then what is the share of B ?
With 200% efficiency C can complete 25% work in 12 days.
⇒ C with 100% efficiency can complete the work in 96 days.
B is 20% more eficient than C, so B can complete the work in 96*(100/120)=80 days.
A with 75% efficiency can complete the work in same days as B ⇒ (100/75)*A=80
.'. A can complete the work in 60 days.
Ratio of efficiencies of A and B = 1/60 : 1/80 = 4 : 3
B's share = (3/4)*10400 = 7800
Correct Option 5)
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Lukman Hussaini
The difference between a two-digit number and the number obtained by interchanging the digits is 36. What is the difference between the sum and the difference of the digits of the number if the ratio between the digits of the number is 1 : 2 ?