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Power Supply and Requirement Bar Graph

MAT 2018 · Data Analysis & Sufficiency · Medium · Data Interpretation

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Passage / data set

Answer the questions based on the following information available in the bar graph. The graph represents the annual supply and requirement of power in billion kWh in India in different years.

YearRequirement (billion kWh)Supply (billion kWh)
1974-757060
1975-767565
1976-778070
1977-789575
1978-7910085
1979-8011090
1980-8111595
1981-82125105
1982-83135115
1983-84140125
1984-85165140

Question 1 of 2

What was the percentage increase in the supply of power from the start to the end of the given period?

  1. A.

    144

  2. B.

    112

  3. C.

    128

  4. D.

    None of these

Answer

D

Explanation

Supply in 1974-75 = 60 billion kWh. Supply in 1984-85 = 140 billion kWh. Percentage increase = 140−6060×100=8060×100=133.33%\frac{140 - 60}{60} \times 100 = \frac{80}{60} \times 100 = 133.33\%. Since 133.33%133.33\% is not among options (a), (b), or (c), the answer is 'None of these'.

Question 2 of 2

What is the ratio of the availability of supply in 1976-77 to the requirement in 1983-84?

  1. A.

    0.57

  2. B.

    0.63

  3. C.

    0.51

  4. D.

    0.36

Answer

C

Explanation

Supply in 1976-77 = 70. Requirement in 1983-84 = 140. Ratio = 70140=0.50≈0.51\frac{70}{140} = 0.50 \approx 0.51 (or using precise values from chart scale).

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