Question
A can do a piece of work in 28 days, while B can do the
same piece of work in 42 days. They begin working together and 6 days before completion of work, A leaves. Find the total number of days taken to complete the work.Solution
Suppose the work finished in x days. A' s one day work is 1/28 day B's one day work is 1/42 day According to the question, Let the total work was done in x days then, A works for (x - 6)days Then, (x - 6)/28 + x/42 = 1 3x – 18 + 2x = 84 5x = 102 x = 102/5 days. Alternate Method: A B 28 42 let total work = LCM of 28 & 42 = 84 units So Eff : 3 : 2 So in last 6 days B worked alone so his work in last 6 days = 2`xx` 6 = 12 units So remaining work = 84-12 = 72 units Hence A & B will do it in = 72/5days Hence total days = 72/5 +6 = 102/5 days
Evince
In the given question, a word has been given and there are three ways in which the word has been used, in similar or different forms. You need to see w...
Select the word which means the same as the group of words given.
Extreme fear of confined places
Select the word which means the same as the group of words given.
A room or building with equipment for doing physical exercise
Directions: In the given question, a word has been mentioned and there are three ways in which the word has been used in either similar or different wa...
In the following question, a word has been given and there are three ways in which the word has been used, in similar or different forms. You need to se...
Directions : A word is given followed by a sentence using that word or a form of that word. From the options below, choose the sentence that uses the ...
In the following question, a word has been given and there are three ways in which the word has been used, in similar or different forms. You need to se...
Tempestuous
Yield
A. Increasingly, farm land is yielding to property development.
B. Our research has only recently begun to yield important resu...
Relevant for Exams:
