Posted by **Anonymous** on Wednesday, December 19, 2012 at 1:19pm.

A man has Rs 50,000.He invests some part of it in one bank @ of 11 p.c.p.a. and the remaining money in another bank @ of 9 p.c.p.a.He gets a combined simple interest of Rs 5,400(i.e the S.I of one bank + S.I of another bank = 5,400).Then find the amount of money invested in both the banks individually

- maths --plse help me.. -
**Damon**, Wednesday, December 19, 2012 at 1:43pm
.11 a + .09 b = 5400

but

b = 50,000 - a

so

.11 a + .09 (50,000 -a) = 5400

.11 a + 4500 - .09 a = 5400

.02 a = 900

a = 45,000

then

b = 5,000

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