Question
A can do a work in 30 hours while B can do it in 20
hours. If C is 60% more efficient than A and B together, then find the time taken by C alone to complete the work.Solution
ATQ, Total work = LCM of (30 and 20) = 60 units
Work by A in one hour = 60 ÷ 30 = 2 units
Work by B in one hour = 60 ÷ 20 = 3 units
Work by A and B together = 2 + 3 = 5 units
C is 60% more efficient → C’s work = 5 + (60% of 5) = 5 + 3 = 8 units
Time taken by C = 60 ÷ 8 = 7.5 hours
Three of the following letter-clusters are alike in some manner and hence form a group. Which letter-cluster does not belong to that group?
Select the related number from the given alternatives:
11 : ? :: 10 : 1001
Given set: [20, 82, 31]
Select the option in which the numbers are related in the same way as are the number of the following set.
(4, 12, 132)
Select the option that is related to the third number in the same way as the second number is related to first number and the sixth number is related t...
Select the option that can replace the question mark (?) in the given figure and complete the pattern (rotation is NOT allowed)
Select the option that is related to the third letter-cluster in the same way as the second letter cluster is related to the first letter-cluster.
S...If ACE = 135 and ACER = 13518, then ACCURATE =
Fish : Aquarium :: Birds : ?
Average age of a Father and his son Is 22 years. Ratio of their age is 10 : 1, what is the age of the son?
