Question

a sum of money lent at simple interest amounts to rs3224 in 2 yrs and rs4160 in 5yrs. find the sum and the rate of interest. it's urgent plz and fast....

Answer 1

HERE IS YOUR ANSWER

AMOUNT OF 5 YEARS = PRINCIPAL + SI FOR 5 YEARS = RS 4160

AMOUNT OF 2 YEARS = PRINCIPAL + SI FOR 2 YEARS

ON subtracted, WE GET

SI FOR 3 YEARS = ( 4160 -3224 ) = RS 936

==> SI FOR 2 YEARS = 936/3*2 = RS 624

==> SUM = ( AMOUNT FOR 2 YEARS ) -- ( SI FOR TWO YEARS )

= RS(3224 - 624) = RS 2600

NOW,PRINCIPAL = 2600, SI = RS 624, TIME = 2 YEARS.

SO, RATE = 100 × 624/2600 × 2
=12℅ PER ANNUM. ANSWER


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