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- Question
- Find the difference between simple interest and true discount on Rs. 960 due 4 year hence at 5% per annum simple interest?
Options- A. Rs. 32
- B. Rs. 52
- C. Rs. 42
- D. None of these
- Correct Answer
- Rs. 32
ExplanationS.I. - T.D. = [A x (R.T)2] / [100(100 + R.T.)]
= [960 x (4 x 5)2] / [100 x (100 + 4 x 5)]
= [(960 x 20 x 20) / (100 x 120)] = Rs. 32 - 1. The difference between the simple interest and the true discount on a certain sum for 6 months at 4% is Rs. 15. Find the sum?
Options- A. Rs. 32850
- B. Rs. 28250
- C. Rs. 38250
- D. Rs. 38350 Discuss
- 2. The true discount on a bill a due 8 months hence at 12% per annum is Rs. 240. Find the amount of the bill and its present worth?
Options- A. Rs. 3000, Rs . 3240
- B. Rs. 2000, Rs . 2240
- C. Rs. 2100, Rs . 2340
- D. None of these Discuss
- 3. The true discount on Rs. 1860 due after a certain time at 5% is Rs. 60. The time after which it is due is?
Options- A. 6 months
- B. 8 months
- C. 9 months
- D. 10 months Discuss
- 4. Find the present worth (PW) and the true discount reckoning 6% per annum simple interest of Rs. 176 due in 20 months time?
Options- A. Rs. 160, Rs. 16
- B. Rs. 130, Rs. 46
- C. Rs. 150, Rs. 26
- D. None of these Discuss
- 5. The true discount on Rs. 2575 due 4 months hence is Rs. 75. The rate percent is?
Options- A. 6%
- B. 8%
- C. 9%
- D. 5% Discuss
- 6. What will be the present worth of ? 3720 due 3 yr hence at 8% per annum? Also, find the true discount.
Options- A. PW = ? 3000 and TD = ? 720
- B. PW =? 15000 and TD = ? 720
- C. PW = ? 3000 and TD = ? 320
- D. PW = ? 1000 and TD = ? 420 Discuss
- 7. Find the sum due, if the true discount on a sum due 2 yr hence at 7% be ? 672.
Options- A. ? 5500
- B. ? 5425
- C. ? 5472
- D. ? 5300 Discuss
- 8. The true discount on a certain sum money due 4 yr hence is ? 75 and the simple interest on the same sum for the same time and at the same rate of interest is ? 225. Find the rate per cent.
Options- A. 25%
- B. 50%
- C. 31%
- D. 45% Discuss
- 9. Vandana bought a watch for ? 600 and sold it the same day for ? 688.50 at a credit of 9 months and this way she gained 2%. Find the rate of interest per annum.
Options- A. 162/3%
- B. 152/3%
- C. 112/3%
- D. 52/3% Discuss
- 10. The present worth of Rs. 1404 due in two equal half yearly instalments?
Options- A. Rs. 1325
- B. Rs. 1300
- C. Rs. 1350
- D. Rs. 1500 Discuss
True Discount problems
Search Results
Correct Answer: Rs. 38250
Explanation:
? 15 = [A x (4 x 1/2)2] / [100(100 + 4 x 1/2)]
? 15 = (A x 4) / (100 x 102)
? A = 15 x 25 x 102
? A = Rs. 38, 250.
Correct Answer: Rs. 3000, Rs . 3240
Explanation:
P.W. = (100 x T.D.) / (R x T) = (100 x 240) / (12 x 8/12) = Rs. 3000
? P.W. is Rs. 3000
? A = Amount of bill = P.W. + T.D. = 3000 + 240 = 3240
Correct Answer: 8 months
Explanation:
P.W. = (Sum due) - (T.D.)
= Rs. (1860 - 60) = Rs. 1800
Thus, Rs. 60 is S.I. on Rs. 1800 at 5% per annum
? Time = (100 x 60) / (1800 x 5) years
= 2 / 3 years = 8 months
Correct Answer: Rs. 160, Rs. 16
Explanation:
P.W. = (100 x 176) / (100 + (6 x 20)/12) = Rs. 160
T.D. = Amount - present worth
= Rs. 176 - Rs. 160 = Rs. 16
Correct Answer: 9%
Explanation:
P.W. = Rs. (2575 - 75) = Rs. 2500
? Rate = (100 x 75 x 3) / (2500 x 1)% = 9%
Correct Answer: PW = ? 3000 and TD = ? 720
Explanation:
Let PW be N.
? 3720 - N = (N x 8 x 3) / 100 = 6N / 25
? 31N = 3720 x 25
? N = (3720 x 25) / 31 = ? 3000
TD = Amount - PW = 3720 - 3000 = ? 720
Correct Answer: ? 5472
Explanation:
Given that, R = 7%, T = 2 yr,
TD = ? 672 and Sum due (A) = ?
According to the formula, (3)
TD = (A x R x T) / (100 + R x T)
? 672 = (A x 7 x 2) / (100 + 7 x 2) = 14A/114
? A = (114 x 672)/14 = ? 5472
Correct Answer: 50%
Explanation:
Given that, SI = ? 225, TD = ? 75,
T = 4 yr and R = ?
According to the formula,
SI - TD = (TD x R x T)/100
? 225 - 75 = (75 x R x 4)/100
? 150 = (75 x R x 4) /100
? 3R = 150
R = 50%
Correct Answer: 162/3%
Explanation:
SP = 102% of ? 600 = (102/100) x 600 = ? 612
Now, PW = ? 612 and sum = ? 688.50
? TD = 688.50 - 612 = ? 76.50
Thus, SI on ? 612 for 9 months is ? 76.50.
? Rate = (100 x 76.50) / (612 x 3/4)
= (100 x 76.50) / (153 x 3)
=162/3%
Correct Answer: Rs. 1325
Explanation:
Required sum = P.W. of Rs. 702 due 6 months + P.W. of Rs. 702 due 1 year hence.
= Rs. {100 x 702} / {100 + 8 x (1/2)} + Rs. {100 x 702} / {100 + 8 x 1}
? Total P.W. = Rs. (675 + 650)
= Rs. 1325
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