I will definitely make brain list if you will give me the answer of question that soon in pic of question number 6 7 8 and 9 I will definitely make brain least 2 times and
Answers
5)
Principal = ?
CI = 3520
Rate = 20%
Time 2 years
CI = P (1+r/100)^t - P
3520 = P (1 + 20/100)² - P
3520 = P (6/5)² - P
3520 = 36P/25 - P
3520 = 11P/25
11P = 88000
P = 88000/11
P = 8000
---------------------------------------------------------------------------------------
6)
Principal = 2000
Amount = 2420
Rate = 10%
Time = t
Amount = Principal (1 + r/100)^t (where r is rate and t is time)
2420 = 2000 (1 + 10/100)^t
2420/2000 = (1 + 1/10)^t
(11/10)^t = 2420/2000
(11/10)^t = 121/100
(11/10)^t = (11/10)²
Hence t = 2 years
-----------------------------------------------------------------------------------------------------------
7)
Amount = 661.5
Principal = 600
Time = 2 years
Rate = ?
Amount = Principal (1 + r/100)^t
600 (1 + r/100)² = 661.5
(1 + r/100)² = 661.5/600
(1 + r/100)² = 6615/6000
(1 + r/100)² = 1323/1200
(1 + r/100)² = 441/400
(1 + r/100) = √441/400
(1 + r/100) = 21/20
r/100 = 21/20 - 1
r/100 = 1/20
r = 100/20
r = 5%
---------------------------------------------------------------------------------------------------------------
8)
Solution is in the pic attached
--------------------------------------------------------------------------------------------------------------
9)
Amount = 15972
Principal = 12000
Rate = 10%
Principal (1 + r/100)^t = Amount
12000 (1 + 10/100)^t = 15972
(1 + 1/10)^t = 15972/12000
(11/10)^t = 5324/4000
(11/10)^t = 1331/1000
(11/10)^t = (11/10)³
t = 3
hence time is 3 years
Step-by-step explanation:
- please mark only one question please