Find the simple interest on 3,750 in 5 years at 3% rate per annum.
1 answer:
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Answer:
Step-by-step explanation:
Given that,
In an AP, the 6th term is 39 i.e.
In the same AP, the 19th term is 7.8 i.e.
Subtract equation (1) from (2).
7.8 - 39 = a+18d - (a+5d)
-31.2 = a +18d-a-5d
-31.2 = 13d
d = -2.4
Put the value of d in equation (!).
39 = a+5(-2.4)
39 = a- 12
a = 39+12
a = 51
The sum of n terms of an AP is given by :
Put n = 25 and respected values,
Hence, the sum of first 25 terms of the AP is equal to 555.