সব প্রশ্নে ফিরে যান
Math
2 large and 1 small pumps can fill a water tank in 4 hours. One large and 3 small pumps can also fill the same water tank in 4 hours. how many hours will it take for 3 large and 4 small pumps to fill the tank?
A) 2 hours
সঠিক উত্তর
B) 2.5 hours
C) 3 hours
D) 3.5 hours