Question
Pipe ‘A’ and pipe ‘B’ can fill a cistern in 20
minutes and 12 minutes respectively. Pipe ‘C’ alone can empty the cistern in 10 minutes. If all three pipes are opened together then what is the time taken to fill 50% of the cistern?Solution
Let the capacity of the cistern = 60 units Then, efficiency of pipe ‘A’ = 60/20 = 3 units/minute Efficiency of pipe ‘B’ = 60/12 = 5 units/minute Efficiency of pipe ‘C’ = 60/10 = 6 units/minute So, combined efficiency of pipes ‘A’, ‘B’ and ‘C’ = 3 + 5 – 6 = 2 units/minute 50% of the cistern’s capacity = 30 units Therefore, time taken by all 3 pipes together to fill 50% of the cistern = 30/2 = 15 minutes
Change
I. Empowering and motivating the head of schools to take the lead and be the change agent for their school would be the key focus of thi...
In each of the following questions, a word has been given followed by three sentences. Identify the sentence(s) in which the word is used correctly (gr...
In the given question, a word has been given and there are three ways in which the word has been used, in similar or different forms. You need to see w...
- A word has been used in the sentences given below. Identify the statement(s) where the word has been used in a contextually and grammatically correct manne...
In the question below, a sentence is given, four words have been highlighted in bold. Find out if the words are appropriate (grammatically and contextu...
Embrace
I. We embraced at Miami for our Caribbean cruise.
II. The monarchy was notoriously reluctant to embrace change.
III. We hop...
In the question given below, a word has been given and there are three ways in which the word has been used, in similar or different forms. You need to...
In the following question, a word has been used in sentences in THREE different ways. Choose the option corresponding to the sentences in which the usa...
Volatile
(1) India continues to be a bright spot in terms of steel demand and consumption as compared to the global scenario, which remains vol...
In the following question, a word has been used in sentences in THREE different ways. Choose the option corresponding to the sentences in which the usa...
Relevant for Exams:
