Question

If the ratio of processing cost for water for industrial, energy and domestic usage is 3: 5: 2, what is the ratio of processing cost for above mentioned usage in 2006 to that in 2009?

• A. 0.68
• B. 0.72
• C. 0.60
• D. 0.77
• A. 14.4\(\%\)
• B. 23.3\(\%\)
• C. 15.4\(\%\)
• D. 34.6\(\%\)
• A. 65.18\(\%\)
• B. 83.45\(\%\)
• C. 78\(\%\)
• D. 69.6\(\%\)
• A. 3.16
• B. 2.26
• C. 2.08
• D. 1.82
• A. Domestic
• B. Industrial
• C. Others
• D. Energy

Answer 1

The Correct Option is B

Required ratio = \(\frac{25×3+26×5+35×2}{49×3+35×5+30×2}\) = 0.719
So the correct option is (B)

Answer 2

Required increase = \(\frac{35-26}{26}\)×100 = 34.6\(\%\)
So the correct option is D

Answer 3

Total usage in 2009 = 490 + 25 + 30 + 35 + 49
= 629 billion litre
Irrigation usage in 2009 = 490
Required percentage = \(\frac{490}{629}\)×100 = 77.9\(\%\) 
So the correct option is C

Answer 4

Domestic usage in

2006 = \(\frac{35}{410 + 35 + 35 + 26 + 25}\)×100 = 6.59\(\%\)

Domestic usage in 

2009 = \(\frac{30}{490 + 25 + 30 + 35 + 49}\)×100 = 4.77\(\%\)

Required difference = 6.59 − 4.77 = 1.82\(\%\) 
So the correct option is (D)

Answer 5

From the visual observation of pie chart, we can say
that the industrial usage shows the highest percentage 
increase (\(\frac{49 - 25}{25}\)×100 = 96\(\%\)) 
So, the correct option is (B)