A tap can fill a tank in 48 minutes whereas another tap can empty it in 2 hours. If both the taps are opened at 11:40 A.M, then the tank will be fille

C) both ‘A’ and ‘B’

Correct option is (D) \(7\,\frac{1}{2}\) hrs \(\because\) Time taken to fill a \(50\,l\) of tank = 5 hours \(\therefore\) Time taken to fill a \(75\,l\) of tank \(=\frac5{50}\times75\;hours\) \(=\frac{75}{10}\;hours\) = 7.5 hours = 7 hours + \(\frac12\) hours = \(7\frac12\) hours

Correct option is (C) 96 Time = 1 hr 20 minutes = (60+20) minutes = 80 minutes Total work done by 6 pumps in 1 hr 20 minutes \(=6\times80=480.\) Let 5 pumps take time to fill the...

Correct option is (B) 36 Total work done by 24 men in 14 days by working 6 hours a day \(=24\times14\times6\) Let x men are required to complete same work in 8 days...

Correct option is (D) 400 km Speed of the car \(=\frac{Speed}{Time}\) \(=\frac{300\,km}{6\,hours}\) = 50 km/h Distance travelled by the car in 8 hours = speed \(\times\) time = 50 km/h \(\times\) 8 hours = (50 \(\times\) 8) km = 400 km

Correct Answer - 12 hours