Question

A sum of money put out at simple interest amounted to Rs. 915 in 4 years at 5.5% per annum.what is the sum

Answer 1

Step-by-step explanation:

Let the principal be ₹100

$\implies$ $SI=\Large\frac{PTR}{100}$

$\implies$ $SI=\Large\frac{100×4×5.5}{100}$

$\implies$ $SI=22$

$\implies$ $A=P+SI$

$\implies$ $A=100+22$

$\implies$ $A=122$

If Amount is 122, then principal is 100

if Amount is 915, then principal is P

By Direct variation,

$\implies$ $P×122=915×100$

$\implies$ $P=\Large\frac{915×100}{122}$

$\implies$ $\boxed{Principal=750\:Rupees}$

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