The basic fuel expenditure of a country is dominated by four major uses - Domestic, Transport, Industry and Electricity. In 1992, the total amount of energy used was equivalent to 600 million tonnes of coal.

1
The energy consumed for other purposes is approximately what percentage of total energy consumed for the other four major uses in 1992 was?
 
» Explain it
B
Energy used for others purpose = 20°

Total Energy used for 4 major areas = 110° + 105° + 45° + 80° = 340°

 ∴   Required percentage

20  × 100 = 5.88% ≈ 6%
340

Hence, option B is correct.

2
What is difference between energy used for domestic purposes and other purposes in the country in 1992?
 
» Explain it
B
As per the given data given difference between energy used for domestic purpose and other purposes = 45° - 20° = 25°

Now, 360° is equivalent to 600 million tonnes
 
Then, 25° =  600  × 25
360

= 41.67 million tonnes

Hence, option B is correct.

3
The difference between the fuel consumption of Industry and Transport in 1992 was equal to?
 
» Explain it
C
The difference between fuel consumption of Industry and transport in degrees = 110° - 80° = 30°

Now, As 360° = 600 million tonnes
 
Then, 30°  =  600  × 30 = 50 million tonnes
360

Hence, option C is correct.

4
If the energy requirement of electricity in 1992 were 350 million tonnes, the amount of additional primary energy required would be?
 
» Explain it
A
Electricity consumed = 105°

Let's assume the total energy requirment be x million tonnes

Then, 105° : 350 :: 360° : x
 
 x =  350 × 360°  = 1200 million tonnes
105


 Additional energy required = 1200 - 600 = 600 million tonnes

Hence, option A is correct.
 

5
If instead of coal, oil has been used in industry purposes and if 1 tonne of coal is equivalent to 3/4 tonnes of oil, what approximate amount of oil will be required in industry?
» Explain it
E
Given, 1 tonne of coal = 0.75 tonnes of oil

600 million tonnes = 0.75 × 600 = 450 million tonnes

Now, consumption of oil in industry —
 
110  × 450 = 137.5 million tonnes
360

Hence, option E is correct.


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