hi, pls solve this question.......thanks in advance
peter invested an amount of rs.12000 at the rate of 10p.c.p.a and another amount atthe rate of 20p.c.p.a.simple interest.
the total interest earned at the end of the year on the total amount invested became 14p.c.p.a.
find the total amount invested..................................................?pls help
Total amout invested is Rs. 20000
12000 @ 12% interest is Rs. 1200
8000 @ 20% interest is Rs. 1600
Total investment Rs,20000 total interest Rs. 2800
Interest on total investment Rs. 20000 @ 14% = Rs. 2800
Average interest rate is 14%
hie
let the 2nd amount invested be x
interest on x @ 20% for 1 year is x/5
total interest earned= 1200+ x/5
now
1200+ x/5 = 14% of total amount
1200+ x/5 = 14/100 *( x+ 12000)
solve and get x= 8000
so total amount invested= 12000+8000=20000
good explaination
| Originally posted by : Sunshine... | ||
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hie let the 2nd amount invested be x interest on x @ 20% for 1 year is x/5 total interest earned= 1200+ x/5 now 1200+ x/5 = 14% of total amount 1200+ x/5 = 14/100 *( x+ 12000) solve and get x= 8000 so total amount invested= 12000+8000=20000 |
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