percentage

A farmer stores 10000 kg of potatoes in an underground cellar. At the prevailing buying rates in the whole sale market he is unable to make any profit. He is advised that the market price of potatoes will climb @ 3% per month, whereas the loss in weight of potatoes due to evaporation of water was @1% per month.

After how many months should he sell his stock of potatoes so as to make a profit of 10%.

 

 Check the answer:

 

9 - equation of line parallel to given line

Two points A and B have the following coordinated (2, 2) and 

(10, 8) respectively.

Find the equation of straight line which passes through point (3, 4) and is Parallel to AB?

8-equation of perpendicular to given line

Two points A and B have the following coordinated (2, 2) and 

(10, 8) respectively.

Find the equation of straight line which passes through point (3, 4) and in perpendicular to AB?

7-dividing a line segment to a given ratio

Two points A and B have the following coordinated (2,2) and (10,8) respectively.

Find the coordinates that divide the line segment in the ratio of 2:3?

6-midpoint of a line segment

Two points A and B have the following coordinated (2,2) and (10,8) respectively.

Find the midpoint of the line segment?

5-forming equation of straight line

Two points A and B have the following coordinated (2,2) and (10,8) respectively.

Form the equation of straight line passing through these 2 points?

4- coordinate geometry -distance between two points

Two points A and B have the following coordinated (2,2) and (10,8) respectively.

Find the length of the line segment?

16-time and work

A can do a piece of work in 9 days and B can do a piece of work in 12 days respectively. If they work only on alternate days, then how many days will it take for the work to get completed?

 

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14-chain rule / time and work

For a certain job, 60 days are required for a group of men. If 8 more are added to the group, then it would take 10 less days to complete the job. How many men were there initially?

13-chain rule / time and work

8 men or 12 boys can do a piece of work in 50 days. In how many days will 11 boys and 6 men do the job?

12-chain rule / time and work

6 men or 12 boys can do a piece of work in 40 days. In how many days will 16 boys and 24 men do the job?

11-time and work / chain rule

For a certain job, 40 days are required for a group of men. If 12 out of the group never turned up for the job, then it took the remaining men 64 days to get the job completed. How many men were there initially?

10-chain rule / time and work

A student hostel has 280 students. It has ration for 20 days. 40 students leave for home on Christmas after 8 days of staying together. How many days will the ration last?

9- chain rule / time and work

3 men or 5 boys can do a piece of work in 30 days. In how many days will 5 boys and 12 men do the job?

chain rule

In a hostel, ration for 2000 students is sufficient for 54 days. After 15 days some more people join in and the ration lasted for only 20 more days. How many people joined in later?

chain rule

48 men working 4 hours a day can complete the work in 10 days. How many men will be required to complete the work in 6 days, working 10 hours a day?

chain rule / unitary method

40 girls can make 30 boxes in 20 days. How many more girls should be employed to prepare 60 boxes in 25 days?

chain rule / unitary method

If 16 pens cost Rs 240 what will be the cost of 18 pens?

Chain rule / unitary method

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distance and speed

A man can row 15 km/hr in still water. It takes him twice as long to row upstream than to row downstream. What is the speed of the stream?

distance and speed

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distance and speed

A boat can row upstream at 12 km/hr and downstream at 24 km/hr, what is the speed of the boat?

distance and speed

A man can row at 10 km/hr in still water. In a steam that is flowing at 4 km/hr, it takes him 2 hours to row to the place and back to where he started from. How far is the place?

distance and speed

Two men ride towards each other from two places 80 km apart, one at 18 km/hr and the other at 14 km/hr. Find when they are first 16 km apart. Also find when they will be16 km apart for the second time.

simple equation

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A and B start at noon from two towns 60 km apart, A's rate of walking being twice B's. If they take 5 hours before they meet, find their rates of walking.

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A man's age is 3 times the sum of the ages of his two sons, one of whom is twice as old as the other; in 12 years the sum of the son's ages will be three fourth of their father's age. Find the age of the father.

simple equation

A is 12 years older than B; 12 years ago he was twice as old as B then was. How old is A now?

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In 17  years a father will be twice as old as his son, whose age at the present time is one third of his father age. How old is his father now?

distance and speed

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