Multiple choice

There is a water tank of capacity 1000 litres. Two filling pipes A and B connected with it can fill the tank in 15 hours and 12 hours respectively. The rate at which B fills the tank is more/less than that of A by what percent? एक पानी की टंकी 1000 लीटर क्षमता की है। दो भरने वाली पाइप A और B इसके साथ जुड़े हुए है और वे क्रमशः 15 घंटे और 12 घंटे में टैंक भर सकते हैं। जिस दर पर B टैंक भरता है वह A की अपेक्षा कितना प्रतिशत ज्यादा / कम है?

  1. 15%

  2. 16.66%

  3. 25%

  4. 33.33%
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Pipe A fills at 1000/15 = 66.67 L/hr. Pipe B fills at 1000/12 = 83.33 L/hr. B is faster by (83.33-66.67)/66.67 = 16.67/66.67 = 0.25 = 25%. The percent more/less is always calculated relative to the base being compared to, which is A here.

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