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Following are the car parking charges near a railway station upto


Solution: We have:


Solution: We have:

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In question 2 above, if 1 part of a red pigment requires 75 mL of base, how much red pigment should we mix with 1800 mL of base?


Observe the following tables and find if x and y are directly proportional.

(i)

X

20

17

14

11

8

5

2

y

40

34

28

22

16

10

4

(ii)

X

6

10

14

18

22

26

30

y

4

8

12

16

20

24

28

(iii)

X

5

8

12

15

18

20

y

15

24

36

60

72

100


A mixture of paint is prepared by mixing 1 part of red pigments with 8 parts of base. In the following table, find the parts of base that need to be added.


If we fix time period and the rate of interest, simple interest changes proportionally with principal. Would there be a similar relationship for compound interest? Why?


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