Question

sum of the Rs 3000 partly lent at 3% p.a sim0le Interest for 7/2 years and partly at 2% p.a simple Interest for 4 years.if total Interest earned is Rs 280,then the lent at 3% p.a is?​

Answer 1

Step-by-step explanation:

Let the lent at 3% p.a is p

p ×( 3/100)(7/2) + (3000 – p)(2/100)4 = 280

or, (0.105 – 0.08)p = 280 – 240

or, 0.025p = 40

or, p = Rs 1600