Answer:A Explanation: In this type of question, where we have one person work and together work done. Then we can easily get the other person work just by subtracting them. As, Son's one day work = [Math Processing Error] So son will do whole work in 15/2 days which is = [Math Processing Error]
Answer:D Explanation:In this question we having, A's work, B's work and A+B+C work. We need to calculate C's work. We can do it by, (A+B+C)'s work - (A's work + B's work). Let's solve it now: C's 1 day work = 1 4 −( 1 16 + 1 12 ) =( 1 4 − 7 48 ) = 5 48 So C can alone finish the job in 48/5 days, Which is = 9 3 5 days
Answer:D Explanation: A+B 1 day work = 1/8 B+C 1 day work = 1/12 A+B+C 1 day work = 1/6 We can get A work by (A+B+C)-(B+C) And C by (A+B+C)-(A+B) So A 1 day work = 1 6 − 1 12 = 1 12 Similarly C 1 day work = 1 6 − 1 8 = 4−3 24 = 1 24 So A and C 1 day work = 1 12 + 1 24 = 3 24 = 1 8 So A and C can together do this work in 8 days
Answer:C Explanation:Suppose B takes x d�ys to do the work. As per question A will take 2∗ 3 4 ∗x= 3x 2 days (A+B)s 1 days work= 1/18 1/x + 2/3x = 1/18 or x = 30 days
Answer:A Explanation: Ratio of times taken by A and B = 1:3 Means B will take 3 times which A will do in 1 time If difference of time is 2 days, B takes 3 days If difference of time is 10 days, B takes (3/2) * 10 =15 days