Question

2. Find the principal which will earn a compound interest of:
(a) rs2,100 in 4 years at 7.5 % per annum.
(b) rs3,840 in 4 years at 12% per annum.
(c) rs16,500 in 2 years at 5% per annum.

plz answer correctly and tell rs 2100 is principal or amount ​

Answer 1

Answer:

Interest = PRT/100

Amount = Principal + Interest

Let the rate be r%

Interest = (2100 × r × 2)/100

2352 - 2100 = (2100 × r × 2)/100

252 = 42r ⇒ r = 6%

New rate of interest = r - 1 = 5%

Interest when r% is 5% = (P × (5) × 2)/100 = (2100 × 5 × 2)/100 = Rs. 210

Step-by-step explanation:

Answer 2

Step-by-step explanation:

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