Question
Puneet and Qureshi together can complete (7/8)th of a
piece of work in 9 days, Qureshi and Rohit together can complete (3/5)th of the work in 8 days and Puneet and Rohit together can complete (4/5)th of the work in 9 days. In how many days can Puneet alone do the work?Solution
ATQ, Let p, q and r be the respective part of the works that can be done by Puneet, Qureshi and Rohit in one day. Given that, p + q = [(7/8) × (1/9)] = 7/72 q + r = [(3/5) × (1/8)] = 3/40 p + r = [(4/5) × (1/9)] = 4/45 Therefore, 2(p+q+r) = (7/72) + (3/40) + (4/45) = 94/360 p + q + r = 47/360 p = (47/360) - (3/40) = 20/360 = 1/18 Therefore, P alone will take 18 days to complete the work.
Which of the following is a characteristic property of acids ?
During the fermentation of sugar, the compound which is always formed is…………?
Which of the following is a plant hormone ?
Which of the following pairs of vector and disease is/are correctly matched?
Vector Disease
- Anopheles — Malaria...
Which of the following statement(s) is/are true?
I. During inhalation ribs move out
II. During exhalation ribs move in
Kindly Study the following questions carefully and choose the right answer.
Which of the following is/are true with respect to Amoeba?
I...
Typhoid is caused by ______.
The force which opposes the relative motion between different layers of liquid or gases is called –
Decibel is used to measure the ___________.
For a perfectly elastic collision, the coefficient of restitution (eee) is
Relevant for Exams:
