A tap can fill a tank in 6hours.After half hour the tank filled ,three more similar taps are opened.What is the total time taken to fill the tank completely?

A 3hrs 15min
B 3hrs 45 min
C 4hrs
D 4hrs 15min

Correct Answer: 4hrs

A tap in 6 hours can fill 1 portion A tap in 1 hours can fill 1/6 portion By 1st 1/2 portion is filled by 3 hours The left 1/2 portion is filled by 3 same tap Now, By 1 tap 1/6 portion is filled in 1 hours By. 3 tap 3/6 portion is filled in 1 hours or 1/2 portion is filled in 1 hours So, total required time is = (3 + 1) hours = 4 hours
Bissoy MCQ
#পিএসসি ও অন্যান্য নিয়োগ পরীক্ষা #গণিত #নল ও চৌবাচ্চা (Pipes and cistern) #পল্লী কর্ম সহায়ক ফাউন্ডেশনের অ্যাসিসট্যান্ট ম্যানেজার-০৭.০৩.২০১৪

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