Quiz Discussion

Two pipes can fill the cistern in 10hr and 12 hr respectively, while the third empty it in 20hr. If all pipes are opened simultaneously, then the cistern will be filled in:

• 1] 7.5 hr
• 2] 8 hr
• 3] 8.5 hr
• 4] 10 hr

A can write 75 pages in 25 hours. A and B together can write 135 pages in 27 hours. In what time can B write 42 pages ?

• 1] 17 hrs
• 2] 19 hrs
• 3] 21 hrs
• 4] 23 hrs

A can do a piece of work in 6 days. B is 25% more efficient than A. How long would B alone take to finish this work ?

• 1]

  ${ \text{ 4}}\frac{4}{5}{ \text{ days}}$

• 2]

  ${ \text{ 3}}\frac{1}{3}{ \text{ days}}$

• 3]

  ${ \text{ 5}}\frac{1}{4}{ \text{ days}}$

• 4]

  ${ \text{2}}\frac{2}{3}{ \text{ days}}$

Ganga and Saraswati, working separately can mow field in 8 and 12 hours respectively. If they work in stretches of one hour alternately. Ganga is beginning at 9 a.m., when will the moving be completed?

• 1] 6:20 PM
• 2] 6:30 PM
• 3] 6:36 PM
• 4] 6:42 PM

A company employed 200 workers to complete a certain work in 150 days. If only $\frac{1}{4}$ th of the work had been done in 50 days, then in order to complete the whole work in time, the number of additional workers to be employed were?

• 1] 100
• 2] 600
• 3] 300
• 4] 200