rupees 4000 amount to 5000 in 8 years in what time will 2100 amount to 2800 at the same rate ?
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Answered by
29
si=ptr/100
1000 = 4000*8*r/100
r = 3.125
700=2100*t*3.125/100
t=10 years 8 months
1000 = 4000*8*r/100
r = 3.125
700=2100*t*3.125/100
t=10 years 8 months
Answered by
3
P=4000 n=8 years
Amount=5000
Amount= P[1+ r/100] ^n
5000= 4000[1+r/100]⁸
5/4 = [ 1+ r/100 ]⁸
[1+r/100]=[5/4]^¹÷⁸
acc to question,
2800= 2100 [ 1+ r/100] ^n
4/3 = [5/4]ⁿ÷⁸
(4/3)⁸ = (5/4)ⁿ
4⁸ / 3⁸ = 5ⁿ / 4ⁿ
to solve further give some time to get answer
Otherwise for Objective answer comes by put and get
Amount=5000
Amount= P[1+ r/100] ^n
5000= 4000[1+r/100]⁸
5/4 = [ 1+ r/100 ]⁸
[1+r/100]=[5/4]^¹÷⁸
acc to question,
2800= 2100 [ 1+ r/100] ^n
4/3 = [5/4]ⁿ÷⁸
(4/3)⁸ = (5/4)ⁿ
4⁸ / 3⁸ = 5ⁿ / 4ⁿ
to solve further give some time to get answer
Otherwise for Objective answer comes by put and get
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