Question
A man can complete a job alone in 20 days. A woman can
complete half of the same job in 15 days. If both work together, how many days will it take them to complete 80% of the job?Solution
ATQ,
Time taken by the woman to finish the entire work = 15 ÷ 0.5 = 30 days
Let the total work be 60 units. {LCM of (20 and 30)}
So, efficiency of the man = 60 ÷ 20 = 3 units/day
And efficiency of the woman = 60 ÷ 30 = 2 units/day
So, required time = (60 × 0.8) ÷ (3 + 2) = 9.6 days
They also lay claim to being the only brothers to finish first and second in the same race.
- The following sentence has been divided into parts. One of them contains an error. Select the part that contains an error from the given options. If the se...
From on of the windows of my flat I can see the Qutub minar,” said my friend.
Plastics represent an example of (A)/a consumption externality, which involves much people, (B)/rather than a production externality, (C)/which involve...
In the question below, a sentence is given, divided into five parts (A) , (B) , (C) , (D) and (E) . One of the parts is grammatically incorrect or has ...
You should avoid (A)/to look into these matters as (B)/they are complicated and could be (C)/handled only by a professional (D).
Read the given sentence to find out whether there are any grammatical/ contextual errors in them. The errors, if any, will be in two of the parts of th...
In the question given below, a sentence is given, divided into parts. One of the parts may contain an error. Identify the part that contains the error,...
Read the following sentence carefully and identify if there is any grammatical error in it. If you find any error, choose the part (A, B, C, or D) con...
Guru Gobind Singh said it was our duty to come to the defence of all those who were threatened through no fault of their own.
