Question
Working alone, 'C' can complete a job in 30 days. 'D'
takes 20% less time than 'C' to finish the same job. Calculate the percentage of work done by 'C' and 'D' together in 4 days.Solution
ATQ, Time taken by 'D' alone: 0.8×30=24 days Total work: LCM of 24 and 30 = 120 units Efficiency of 'C': 120/30=4 units/day Efficiency of 'D': 120/24=5 units/day Combined efficiency of 'C' and 'D': 4+5=9 units/day Work done in 4 days: 9×4=36 units Percentage of total work done: (36/120)×100=30 Therefore, 'C' and 'D' together complete 30% of the work in 4 days.
Which of the following is/are correct?
1. They take 5 hours to meet.
2. They meet midway between A and B.
Select...
Consider the following statements :
1. The sum of 5 consecutive integers can be 100.
2. The product of three consecutive ...
Eight students A, B, C, D, E, F, G and H sit around a circular table, equidistant from each other, facing the centre of the table, not necessarily in t...
Consider two Statements and a Question :
Statement-1: The last day of the month is a Wednesday
Statement-2: The third Saturday of the...
A Statement followed by Conclusion - I and Conclusion - II is given below. You have to take the Statement to be true even if it seems to be at variance...
What is the smallest number greater than 1000 that when divided by any one of the numbers 6, 9, 12, 15, 18 leaves a remainder of 3?
Five friends P, Q, X, Y and 2 purchased some notebooks. The relevant information is given below
1. Z purchased 8 notebooks more than X did.
A person P asks one of his three friends X as to how much money he had. X replied, "If Y gives me R 40, then Y will have half of as much as Z, but if Z...
There are two Classes A and B having 25 and 30 students respectively. In Class-A the highest score is 21 and lowest score is 17. In Class-B the highest...
The sum of three consecutive integers is equal to their product. How many such possibilities are there?