Question
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?Solution
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
From the given alternatives select the word which cannot be formed using the letters of the given word
INGREDIENTS
Four number-pairs have been given, out of which three are alike in some manner and one is different. Select the number-pair that is different.
Four number triads have been given, out of which three are alike in some manner and one is different. Select the number triad that is different.
Four number-pairs are given, three among them are alike in certain manner and one is different. Choose the different number-pair.
Three of the following four letter-clusters are alike in a certain way and one is different. Pick the odd one out.
Four number-pairs are given, three of them are alike in a certain manner and one is different. Choose the different number-pair.
Four letter-clusters have been given out of which three are alike in some manner and one is different. Select the one that is different.
Four numbers have been given out of which three are alike in some manner and one is different. Select the number that is different.
Four number-pairs are given, which of them three are alike in certain manner and one is different. Choose the different number-pair.
Three of the four letter-clusters are alike in a certain way and one is different. Pick the odd one out.
