Question

A pipe takes 2 hours 25 minutes 45 seconds to fill a cistern. How long does it take to fill 4 such cistern ??​

Answer 1

9 hours 43 mins 0 seconds

Explanation:

4 (2h 25mins 45s)

8h + 100mins + 180s

• 8h
• 100mins → 1h 40min
• 180s → 3 mins