Question
20 men can do a task in 18 days while 30 women can
complete the same task in 24 days. In how many days will 1 man and 1 woman complete it together?Solution
ATQ,
Let the efficiency of a man and a woman be 'M' and 'W' units/day, respectively.
So, 20 × 18 × M = 30 × 24 × W
Or, M:W = 360 : 720 = 1 : 2
Let M = 1e and W = 2e
Let the required time be 'T' days
So, (1e + 2e) × T = 20 × 18 × 1e
Or, 3T = 360
∴ T = 360 ÷ 3 = 120 days
Which two numbers should be interchanged to make the given equation correct?
14 + 32 − 56 ÷ 28 × 5 = 40
H, I, J, K, M, N and O each have exam on different days of the same week starting on Monday and ending on Sunday. No one has exam before H. Only three p...
In a certain code language, 'MENTOR' is coded as 'EMOUPS' and 'OCTAGON' is coded as 'COUBHPO'. What is the code for 'PENCIL' in the given code language?
The following question is based on the given diagram. The triangle represents ‘teachers’, the circle represents ‘players’, and the rectangle rep...
Select the next number in the category.Â
11, 16, 32, 37, 74,?
Select the number that can replace the question mark (?) in the following series.
5, 9, 17, 33, 65, ?
Three Statements are given followed by two conclusions numbered I and II. Assuming the statements to be true, even if they seem to be at variance with c...
After interchanging which two numbers, the value of the given equation will be ' 33 '?
8 ÷ 2 – 5 – 6 × 7
...Find the missing term:
9, 27, 31, 155, 161, 1127, ?
Three of the following four figures are alike in a certain way and one is different. Select the odd one.
