Question
A can do a work in 10 hours while B can do the same work
in 15 hours. If C is 50% more efficient than A and B together, then find the time taken by C alone to complete the work.Solution
ATQ, Let the total work be LCM of (10 and 15) = 30 units
Work by A in one hour = 30 ÷ 10 = 3 units
Work by B in one hour = 30 ÷ 15 = 2 units
Work by A and B together = 3 + 2 = 5 units
C is 50% more efficient → C’s work = 5 + (50% of 5) = 5 + 2.5 = 7.5 units
Time taken by C = 30 ÷ 7.5 = 4 hours
Read the given statements and conclusions carefully. Assuming that the information given in the statements is true, even if it appears to be at variance...
Read the given statements and conclusions carefully. Assuming that the information given in the statements is true, even if it appears to be at variance...
1, 2, 3, 4, 5 and 6 are written on different faces of a dice. Three different positions of the same dice are shown below. Find the number on the face op...
Select the correct mirror image of the given figure when the mirror MN is placed to the right side of the figure.
Which of the following numbers will replace the question mark (?) in the given series?Â
3, 12, ?, 39, 57, 78
How many different words, with or without meaning, can be formed by using the letter of the word COVID?
After interchanging the given two numbers, what will be the value of the given expression?
20 and 10
10 + 30 – 5 × 20 ÷ 2
If 21st February 2005 was a Sunday, then what would be the day of the week on 21st February 2007?
In a certain code language.
'X @ C' means 'X is the daughter of C',
'X $ C' means 'X is the husband of C',
'X = C' means 'X is the ...
The sequence of folding a piece of paper and the manner in which the folded paper has been cut is shown in the figures below. How would the paper look w...
