Question
βAβ alone can complete a work in 50 hours. βAβ
started the work alone and left after working on it for 40 hours. If βBβ completed the rest of the work in 10 hours then find the time taken by βAβ and βBβ together to complete the whole work.Solution
Let the total work = 200 units Then, efficiency of βAβ = (200/50) = 4 units/hour Work completed by βAβ alone in 40 hours = 4 Γ 40 = 160 units Remaining work = 200 β 160 = 40 units So, efficiency of βBβ = 40/10 = 4 units/hour Therefore, combined efficiency of βAβ and βBβ = 4 + 4 = 8 units/hour So, time taken by βAβ and βBβ together to complete the work = (200/8) = 25 hours
- What will come in place of the question mark (?) in the following questions?
25%Β ofΒ 360+40=? (γ(0.4)γ^(1/3)Β Γ γ(1/64)γ^(1/4)Β Γ γ16γ^(1/6)Β Γ γ(0.256)γ^(2/3))/(γ(0.16)γ^(2/3)Β Γ 4^(-1/2)Β Γγ1024γ^(-1/4) ) = ?
What value should come in place of the question mark (?) in the following question?
468 Γ 4 β 350 Γ· 7 + 130
β (122 + ? + 65) = 14
What will come in place of the question mark (?) in the following expression?
?% of 600 + 15 Γ 28 = 30% of 1800
What will come in place of the question mark (?) in the following expression?
25% of 2000 β 50% of 500 = 100% of ?
What will come in place of (?) in the given expression.
25% of 160 + 15% of 200 = ?641.5 + 72 Γ 8 = ? Γ 4
What will come in the place of question mark (?) in the given expression?
