Quiz Discussion

A completes $\frac{7}{{10}}$ of the work 15 days. Then he completes the remaining work the help of B in 4 days. The time required for A and B together to complete the entire work is = ?

• 1]

  ${ \text{8}}\frac{1}{4}{ \text{days}}$

• 2]

  $10\frac{1}{2}{ \text{days}}$

• 3]

  $12\frac{2}{3}{ \text{days}}$

• 4]

  $13\frac{1}{3}{ \text{days}}$

A and B together can complete a work in 3 days. They start together but after 2 days, B left the work. If the work is completed after two more days, B alone could do the work in

• 1] 5 days
• 2] 6 days
• 3] 9 days
• 4] 10 days

A single reservoir supplies the petrol to the whole city, while the reservoir is fed by a single pipeline filling the reservoir with the stream of uniform volume. When the reservoir is full and if 40, 000 litres of petrol is used daily, the supply fails in 90 days. If 32, 000 litres of petrol used daily, it fails in 60 days. How much petrol can be used daily without the supply ever failing?

• 1] 64000 litres
• 2] 56000 litres
• 3] 60000 litres
• 4] 78000 litres
• 5] None of these

A is thrice as good as workman as B and therefore is able to finish a job in 60 days less than B. Working together, they can do it in:

• 1]

  20 days

• 2]

  $22\frac{1}{2}$ days

• 3]

  25 days

• 4]

  30 days

X alone can complete a piece of work in 40 days. He worked for 8 days and left. Y alone completed the remaining work in 16 days. How long would X and Y together take to complete the work ?

• 1]

  $13\frac{1}{3}{ \text{days}}$

• 2]

  14 days

• 3]

  15 days

• 4]

  $16\frac{2}{3}{ \text{days}}$