P, Q and R can do piece of work in 48, 60 and 80 days respectively. All three began to work together but P and Q left 12 and 16 days respectively before completion of the work. In how many days the work will be done?
P’s one day’s work = 1/48days Q’s one day’s work = 1/60days R’s one day’s work = 1/80days Then, (x -12)/48 + (x - 16)/60 + (x )/80 = 1 (5(x-12)+4(x-16)+3x)/240 = 1 5x – 60 + 4x – 64 + 3x = 240 12x = 240 + 124 12x = 364 x = 364/12 x=91/3 ∴x = 30(1/3) days
Raman and his sister Shikha study in the same class. Raman's rank in an examination is 11th from the bottom and Shikha's rank in the same examination is...
Which number will replace the question mark (?) in the following number series?
2, 3, 6, 10, 17, ?
Which of the following letter-clusters should replace # and % so that the pattern and relationship followed between the letter-cluster pair on the left...
Study the given pattern carefully and select the numbers from among the given options that can replace the question marks (?).
In the following figure, Rhombus represents Authors, Circle represents Poets and triangle represents Actors. Which set of letters represents Poets who a...
A series is given with one term missing. Select the correct alternative from the given ones that will complete the series.
NIE, QLH, TOK, WRN, ...
Statements:
I. Some doctors are engineers.
II. All engineers are lawyers.
Conclusions:
I. Some lawyers are doct...
If the two signs, '× and ÷' are interchanged, which of the following equations will be correct?
In a queue of commanders, Andry is 17th from the extreme front-end and Brooke is 32nd from the extreme back-end. If the two exchange their positions, A...