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46.  A sum of money lent out at SI amount to Rs.7000 after 2 years and Rs.14000 after a further period of 5yrs. Find the principal?


Rs.3700
Rs.4200
Rs.5100
Rs.6300


Answer

 Option

SI for 5 yrs = 14000(7yr) – 7000(2yr) = 7000
SI for 2 yrs = 7000*2/5 = 2800
P = 7000 – 2800 =4200

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47.  If the difference between CI and SI earned on a certain amount at 15% pa at the end of 3 years is Rs.3200, find out the principal?


Rs.45150
Rs.45000
Rs.42560
Rs.42560


Answer

 Option

Sum = D*1003/r2(300+r)
S = 3200*1003/152(300+15)
S = 3200*100*100*100/225*315
= 45149.9 = 45150

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48.  The banker's gain on a bill due 1 year hence at 12% per annum is Rs.6. The true discount is?


Rs.72
Rs.36
Rs.54
Rs.50


Answer

 Option

T.D. = B.G.*100/R*T = Rs.(6*100/12*1) = Rs.50

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49.  The banker's gain of a certain sum due 2 years hence at 10% per annum is Rs.24. The present worth is?


Rs.480
Rs.520
Rs.600
Rs.960


Answer

 Option

T.D.= (B.G.*100/Rate*Time) = Rs.(24*100/10*2) = Rs.120
.Therefore 100*T.D/Rate*Time = Rs.(100*120/10*2) = Rs.600

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50.  The present worth of a sum due sometime hence is Rs.576 and the banker's gain is Rs.16. The true discount is?


Rs.36
Rs.72
Rs.48
Rs.96


Answer

 Option

T.D. = Root of P.W.*B.G. = Root of576*16 = 96.

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