A sum of money lent out at simple interest amounts to rupees 4680 in 3 years and to Rupees 5400 in 5 years. Find the sum of money and rate of interest per annum?
step by step explainton please urgent .
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Step-by-step explanation:
in 3 yrs the money amounts to ₹4680
in 5 yrs the money amounts to ₹5400
_______________________________
in 2 yrs the interest is ₹.720
in 1 yr the interest is ₹.(720/2)=₹.360
in 3 yrs the interest is ₹.(360×3)=₹.1080
::principal=₹.(4680-1080)=₹.3,600(ans)
a/q
p=₹.3600
t=3yrs
interest=₹.1080
r=(100×1080)/(3600×3)
=10%per annum ( answer)
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