A man invests a certain sum of money at 6% per annum simple interest and another sum at 7% per annum simple interest. His income from interest after 2 years was Rs. 354. One-forth of the first sum is equal to one-fifth of the second sum. The total sum invested was :
Options:
A .  Rs.3100
B .  Rs.2700
C .  Rs.2200
D .  Rs.1800
Answer: Option B LET THE MAN INVESTS RS.X AT 6% AND RS.Y AT 7% SIMPLE INTEREST ON RS.X AT 6% FOR 2 YEARS + SIMPLE INTEREST ON RS.Y AT 7% FOR 2 YEARS = RS.354 X×6×2/100+Y×7×2/
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