সব প্রশ্নে ফিরে যান
Math
A cistern is normally filled in 8 hours but takes two hours longer to fill because of a leak in its bottoms. If the cistern is full, the leak will empty it in ?
A) 28 hrs
B) 20 hrs
C) 40 hrs
সঠিক উত্তর
D) 36 hrs