Question
Two taps would fill a cistern in 18 and
24 minutes respectively. Both taps being opened. Find when the Ist tap must be turned off so that the cistern may be just filled in 12 minutes.Solution
First tap fills `1/18` of the cistern in 1 minute Second tap `1/24` fills of the cistern in 1 minute. First tap is turned off and the tank is filled in 12 mts. `1/24xx12 = 1/2` of the tank is filled by the second tap in 12 minutes. `1/2` of the tank is filled by the 1st tap in= `18/1xx1/2 = 9mts.` Alternate Method: I II Time 18 24 LCM 72 units Eff 4 : 3 As 1st pipes is closed so 2nd pipes is for whole time , Hence 2nd pipe will finish = 3 `xx` 12=36 units So remaining = 72 - 36 = 36 units which is done by Ist, Hence 1st tap worked for = 36/4 = 9 minutes
The newly launched National Agri-Food Biomanufacturing Institute in Mohali is a merger of which two institutes?
According to the recently released NSeDA report 2021, Which state is the leading state among North East and Hill states Category?
OICA, the international automotive organization, was founded in which year?
Recently who was appointed as the new CEO of NITI Ayog?
In what year was the Bombay Plan, advocating for economic planning in India, put forward?
Which bank has collaborated with fintech company OPEN to launch a digital current account for its customers?Â
In which year was the Indo-Tibetan Border Police (ITBP) founded?
Which new category has been introduced under the Pradhan Mantri Mudra Yojana to cover loans between ₹10 lakh and ₹20 lakh?
Who has been appointed as Punjab National Bank’s first-ever female brand ambassador?
Which Indian state is home to Keenan Stadium?
Relevant for Exams:
