Q can complete a project in ‘x ‘ hours , R needs ‘0.7x’ hours to do half of The same project. R and S jointly can complete the same project in 1/3 of time taken by Q to complete the work alone. Q takes 90 hours more to complete alone as compared to time taken by all three jointly to complete the work. Find the time taken by S to complete 80% of the project alone?
Let time taken by R to finish work is – x hr, By Q is = 1.4x hr Therefore, R+S = (1.4x/3)hr So, by S alone work = [1/3/1.4x) – 1/x ] = 7x/8 hr Entire time taken by all together = (1.4x - 90)hr Therefore, 1/x + 1/1.4x + 8/7x = 1/1.4x-90 1.4x +1+1.6x/1.4x = 1/1.4x -90 5.6x -360 = 1.4x x = 600/7 Hence, time taken by S alone to complete 80% = 7/8 x 600/7 x 0.8 = 60 hrs
In each question below, a sentence is given with an idiom/phrase printed in bold type. That part may contain a grammatical error. Each sentence is follo...
Fill in the blank with an appropriate idiom.
The teacher was so impressed with the student's presentation that she gave him a __________.
Usual practices associated with a particular society, place, or set of circumstances.
kick the bucket
I'm sure you understand that we can't have a mere inspector still wet behind the ears running a case of this importance.
Chew someone out
Given below are the sentences with Idioms and Phrases highlighted in bold. You are required to choose the most correct meaning of the phrase from the ...
lame duck
to hit the headlines
There's no hope for him now because he's lost his tiles and has gone completely crazy.
