Question
P, Q, and R can complete a work in 12 days. 15 days and
30 days, respectively, working alone. How soon can the work be completed if P is assisted by Q and R on alternate days?Solution
Total work = 60 (LCM of 12, 15 and 30) P's efficiency = 60/12 = 5 Q's efficiency = 60/15 = 4 R's efficiency = 60/30 = 2 Pattern of work = PQ, PR, PQ, PR... Work done by PQ and PR in 2 days = (5 + 4) + (5 + 2) = 16 2 days => 16 units 2 × 3 = 6 days => 16 × 3 = 48 units remaining in 12 units done by PQ in = work/efficiency = 9/ (5 + 4) = 1 days Total time taken = 6 + 1 = 7 days Now remaining 3unit work done by PR = 3/5+2=3/7day 7+3/7 =52/7days.
Select the word-pair in which the two words are related in the same way as the two words in the following word-pair.
Painter : Painting
By interchanging the given two signs which of the following equation will be not correct?
× and –
Statements:
X < W ≤ F = Q ≥ P = T ≥O ≥ S = R
Conclusions:
I) Q > R
I) Q = R
The first number in the given number pairs is obtained by performing certain mathematical operation(s) on the second number. The same operation(s) are ...
Select the option in which the numbers are not related in the same way as are the number of the following set.
(520, 8, 56)
Select the option that is related to third letter - cluster in the same way as the second - letter cluster is related to the first letter - cluster and ...
Select the option that is related to the third term in the same way as the second term is related to first term and the sixth term is related to the fif...
Select the combination of letters that when sequentially placed in the blanks of the given letter series will complete the series.
_ K L _ N O J ...
Select the related letters/words/numbers from the given alternatives.
E @ G = 37 : L @ D = 50 :: H @ K = 90 : : P @ F = ?
Find the odd set of numbers from the given alternatives?
