A boy and a girl together fill a cistern with water. The boy pours 4…

Question

A boy and a girl together fill a cistern with water. The boy pours 4 liters of water every 3 minutes and girl pours 3 litres every 4 minutes. How much time will it take to fill 100 litres of water in the cistern?

Accepted Answer

Option C. 48 minutes. Answer & Solution Answer: Option C Solution: Water filled by (boy + girl) in one minute, & 4/3 + 3/4 = 16 + 912 & \,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\, = 2512\, liter Hence, time taken to fill 100 liter, = 100 × 1225 = 48\, minutes