Question
P can complete a piece of work in 15 days. Q in 20 days
and R in 30 days. P and R worked together for three days and then P was replaced by Q. In how many days, altogether, was the work completed (in days)?Solution
Work done by ( P + R ) in 3 days = 3(1/15+1/30) = 3((2+1)/30)=3/10 Remaining work = 1-3/10=7/10 ( Q + R )’s 1 day’s work = 1/20+1/30 = (3+2)/60 = 5/60 = 1/12 Time taken by ( Q + R ) to finish 7/10 part of the work = 12 × (7/10) = 42/5 days = 8(2/5) days Total time = 3 + 8  = 11`2/5`  days. Alternate Method:    P      Q      R   15     20      30 LCM = 60 units Eff 4  :   3  :   2 (P+R)'s 3 days work = (4+2)×3 = 18 units So remaining is done by P & R in = (60-18)/(3+2) = 42/5 days So total days = 3 + (42/5) = 57/5 days
In case of a defined benefit pension plan, the risk of investment and planning is with _____
Which of the following steps were taken during the Liberalisation process in India?
I- The new policy encouraged the entry of private sector firm...
Which rate has replaced LIBOR?
In cost accounting, overheads are classified into various categories based on the nature of the expenses. Which category do Director’s remuneration an...
Which of the following is not one of the major economic challenges that posed threat to global growth, according to the Economic Survey of 2023?
The air conditioners not working in the office is which of the following factors?
The Economic Survey 2023 projects a baseline GDP growth of ________ in real terms in FY24.
Recently RBI approved five banks to work with it on a pilot project for its digital currency -- the Digital Rupee, which of the following is not in the ...
What is the primary objective of the Corporate Debt Market Development Fund (CDMDF), as per SEBI Annual Report 2023-24? Â
What was the increase in the insurance density in India in FY24 as per economic survey 2023-24?
Relevant for Exams:
