A portion of Rs 6600 is invested at a 5 per annum while the remainder is invested at a 3 per annum I...........

Quantitative Aptitude ( CCS) Simple Interest

A portion of Rs.6600 is invested at a 5% per annum, while the remainder is invested at a 3% per annum. If the annual income from the portion earning a 5% per annum is twice that of the other portion, what is the total income from the two investments after one year?

Rs.270

Rs.370

Rs.250

Rs.280

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Explanation:

5x + 3y = z (Total Income)
x + y = 6600 -(1)
5x= 2(3y)
5x – 6y = 0 -(2)
By solving (1) and (2) we get, x = 3600 so y = 3000
(3600*5*1)/100 + (3000*3*1)/100 = 180 + 90 = 270