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
Consider the following about the recent launches portals of Bureau of Indian Standards (BIS):
I. Bureau of Indian Standards (BIS) has launched a ...
- Which country became the first to outlaw AI-generated child sexual abuse content?
Recently Rs 300 Crore Angul-Balram Rail-link Inaugurated to enable the daily________ Despatch.
Who is the author of the book “Bachelor Dad: My Journey to Fatherhood and More”?
Which Indian company is among the 100 most influential companies released by 'Time' magazine?
NITI Aayog, has approved a production-linked incentive (PLI) scheme of over Rs ___ crore for Foxconn India and Padget Electronics for mobile phone manuf...
What is the authorized capital of CCIL IFSC Limited?
The 48th meeting of the Executive Committee of the National Mission for Clean Ganga (NMCG) was held under the chairmanship of Director General, National...
Which bank has partnered with commodities trader Maptrasco, announced the completion of the first “live” transaction of electronic Bills of Lading...
Consider the following about small savings schemes (SSS)?
1. It includes National Saving Certificate and Public Provident Fund.
2. Interes...