Question
P can do ½ of a work in 10 days and Q can do 1/5 of the
same work in 4 days. In how many days can both finish the work, working together?Solution
P can do ½ of a work in 10 days. So P can do the whole work in 10x2 = 20 days. Q can do 1/5 of the same work in 4 days. So Q can do the whole work in 4x5 = 20 days. Let's assume the total work is 20 units. Efficiency of P = 20/20 = 1 unit/day Efficiency of Q = 20/20 = 1 unit/day Time taken by both of them to finish the whole work when working together = 20/(1+1) = 20/2 = 10 days
given in the statements is true, even if it appears to be at variance with commonly known facts, decide which of the given conclusions logically follow...
In the question below, there are three statements followed by three conclusions I, II, and III. You have to take the three given statements to be true ...
Statements:Â Â Â Â Â Â Â Â Some red are yellow.
                             All yellow are green.
    ...
In the questions given below there are three statements followed by three conclusions I, II and III. You have to take the three given statements to be...
At least some singers are dancers. Some dancers are not lyricist.
Statements:Â Some reds are blues.
           All blues are greens.
           Some greens are n...
Statements:
Only a few Bottle is Cold
All Cold are Weather
Some Water are Weather
Conclusions:
I. All Bottle be...
Statements :
Some files are folders.
Some folders are envelopes.
Some envelopes are letters.
Conclusions:
I. Some...
Statements:
N < J; S = M; J ≥ S; P > M
Conclusions:
I. M ≤ J
II. S < P
III. N > S
Statements:
All car are bus.
Some bus are truck.
Some truck are train.
Some train are bike.
Conclusions:
...
Relevant for Exams:
