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 |
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?
Following are the car parking charges near a railway station upto
Solution: We have:
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?