A sum of money lent at simple interest amounts to ₹ 3224 in 2 years at a rate of 12 % per annum. Find the
sum.
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Answer:
Amount in 5 years = (principal SI for 5 years) =Rs4160.
Amount in 2 years = (principal SI for 2 years) = 3224.
On subtracting we get :
SI for 3 years = Rs(4160−3224) = Rs936.
Or SI for 2 years = Rs(936x2/3) = Rs624.
Or sum = (amount for 2 years) - (SI for 2 years) = Rs(3224−624) = Rs2600.
Now, principal = 2600, SI=Rs624, time=2years.
Therefore, rate =(100xSI)/(PxT)= (100x624)/(2600x2)% =12%p.a.
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