Krishna read 1/3 of a book in 1 hour. Then how much he will read in 3 1/3 hrs?

Correct Answer - Dr. Balanc as per Cash Book ₹11,550.

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 (D) 3 Distance covered by car by travelling 60 kmph in 4 hours = speed \(\times\) time \(=60\times4\) = 240 km When car travels at 80 kmph then time by the car \(=\frac{Distance}{Speed}\) \(=\frac{240}{80}\) =...

Correct option is (A) 24 Number of required workers \(=\frac{15\times48}{30}\) \(=\frac{48}2\) = 24

Correct option is (A) \(112\frac12\,km/hrs\) Distance covered by train in \(2\frac12\) hrs = speed \(\times\) time = 90 \(\times\) \(2\frac12\) km = 90 \(\times\) \(\frac52\) km = 45 \(\times\) 5 km = 225 km \(\therefore\) Speed required to covered same distance (225 km) in 2 hours \(=\frac{Distance}{Time}\) \(=\frac{225}2\,km/hrs\) \(=112\frac{1}2\,km/hrs\)

Correct Answer - D Use the concept of Venn diagrams.