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Standard XII

Economics

Determinants of Money Supply

If Ef and ...

Question

If $E_{f}$ and $E_{b}$ are in the ration 20 : 31 $E_{f}$ and $E_{b}$ at 30 K respectively are:

60 kJ and 93 kJ

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-44 kJ and 93 kJ

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13 kJ and -63 kJ

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none of these

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Solution

The correct option is A 60 kJ and 93 kJ
Given, $\frac{E_{f}}{E_{b}} = \frac{20}{31}$ and $E_{f} - E_{b} = - 33 k J$

$∴ E_{f} - \frac{31}{20} E_{f} = - 33 k J$

$∴ E_{f} = \frac{33 \times 20}{11} = 60 k J$

Also, $E_{b} = 93 k J$

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If Ef and Eb are in the ration 20 : 31 Ef and Eb at 30 K respectively are:

The correct option is A 60 kJ and 93 kJGiven, EfEb=2031 and Ef−Eb=−33kJ∴Ef−3120Ef=−33kJ∴Ef=33×2011=60kJAlso, Eb=93kJ

If $E_{f}$ and $E_{b}$ are in the ration 20 : 31 $E_{f}$ and $E_{b}$ at 30 K respectively are:

The correct option is A 60 kJ and 93 kJ
Given, $\frac{E_{f}}{E_{b}} = \frac{20}{31}$ and $E_{f} - E_{b} = - 33 k J$

$∴ E_{f} - \frac{31}{20} E_{f} = - 33 k J$

$∴ E_{f} = \frac{33 \times 20}{11} = 60 k J$

Also, $E_{b} = 93 k J$