30 labourers can built a wall in 9 days. If the same wall is to be built by 20 labourers how many days they will take to complete it?

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 (A) 27 Given that 36 men can built a wall in 12 days. \(\therefore\) Total work = 36 \(\times\) 12 Let 16 men can built the wall in x days. \(\therefore\) Total work = 16 \(\times\) x \(\because\) Both work...

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

Correct Answer - 20

Correct Answer - 16

Work done by A and B in 1 day=1/12 Work done by B and C in 1 day=1/15 Work done by C and A 1 day=1/20 Adding all the three,...

If Y does the work in 3 days, X does it in 1 day, i.e., the difference is 2 days. But the actual difference is 40 days. If difference is...