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SHOW STEP WISE WORKING OF EACH SUM IN THE MATHS NOTE BOOK .

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In practice test on time and work we have different types of questions to solve and get prepared for 8th grade test on time and work. Objective questions on time and work are given to choose the correct answer from each of the following.

Tick (✔) the correct answer in each of the following:

1. A alone can do a piece of work in 10 days and B alone can do it in 15 days. In how many days will A and B together do the same work?

2. Jack can finish a work in 10 days and Tom can do the same work in half the time taken by A. Then, working together, what part of the same work they can finish in a day?

3. A man can do a piece of work in 5 days, but with the help of his son, he can dolt in 3 days. In what time can the son do it alone?

4. White can do a job in 15 days and Lee can do the same job in 9 days. With the help of Scott, they did the job in 3 days only. Then, Scott alone can do the job in __________

5. P can do ¼ of a work in 10 days; Q can do 40% of the work in 15 days and R can do 1/3 of the work in 13 days. Who will complete the work first?

6. A and B are working on an assignment. A takes 6 hours to type 32 pages on a computer while B takes 5 hours to type 40 pages. How much time will they take, working together on two different computers, to type an assignment of 110 pages?

7. Smith and Thomas can do a piece of work in 72 days; Thomas and Clark can do it in 120 days; Smith and Clark can do it in 90 days. In what time can Smith, Thomas and Clark do it, working together?

8. Clark can do a work in 9 days and Nelson in 15 days. If they work on it together for 5 days then the fraction of the work that is left, is _________ .

9. A can do 1/3 of a work in 5 days and B can do 2/5 of the work in 10 days. In how many days can both A and B together do the work?

10. A pipe can fill a water tank in 8 hours. Due to a leak in the bottom of the water tank, it is filled in 10 hours. If the water tank is full, how much time will the leak take to empty it?

11. A tap can fill a oil tank in 15 hours. After half the oil tank is filled, nine more similar taps are opened. What is the total time taken to fill the oil tank completely?

12. Two pipes can fill a tank in 10 hours and 12 hours respectively, while a third pipe empties the full tank m 20 hours. If all the three pipes operate simultaneously, in how much time will the tank be full?

13.One tap can fill a water tank four times as fast as another tap. If together the two taps can fill the water tank in 30 minutes then the slower tap alone will be able to fill the water tank in _______ .

Answers of practice test on time and work are given below;

1. (b)

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Practice Test on Time and Work | Objective Questions on Time and Work

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In practice test on time and work we have different types of questions to solve and get prepared for 8th grade test on time and work. Objective questions on time and work are given to choose the correct answer from each of the following. 1. (b) `

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Rule 4: If A is twice as good as B, then A will take 1/2 time taken by B to complete a work.
B alone can finish in 2x days ( x is work done by A )
Rule 5: If A is thrice as good a as B, then A will take 1/3rd of the time taken by B to complete a work.

B alone can finish in 3x days

Rule 6: If A and B together can do a piece of work in x days.

B and C together takes y days and C and A together takes in z days, then same work can be done by A, B and C alone is ?

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Rule 1: Universal Rule.

M1D1W2 = M2D2W1

M1D1T1W2 = M2D2T2W1 (When time is given )

Rule 2 : If A can do a piece of work in n days.

In one day work done by A is 1/n.

Rule 3: A can do a work in D1 days, B can do same work in D2 days. A and B together do the same work in how many days ?

Formula= (D1*D2)/(D1+D2)