A sum of money at simple interest doubles it self in 10 yrs. find the rate per annum
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Answer:
Let the principal be x , time =10 years , Rate=r% per annum
⇒
100
x×r××10
=
5
2
x+
100
x×r×10
⇒
10
xr
=
5
2x
+
50
2xr
⇒
10
xr
−
50
2xr
=
5
2x
⇒r=
3
2×10
=
3
20
%
Step-by-step explanation:
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