# Mr.Garg lent Rs 15000 to his friend.He charged the interest at 15% per annum on Rs 12500 and 18% on the rest. How much interest did he earn in 3 years ?

2
by chaurasia

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by chaurasia

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r₁ = 15%

t₁ = 3 years

interest, I₁=P₁*r₁*t₁/100 = 12500*15*3/100 = 5625

P₂ = 15000-12500=2500

r₂ = 18%

t₂ = 3 years

interest, I₂=P₂*r₂*t₂/100 = 2500*18*3/100 = 1350

Total interest, I=I₁+I₂=5625+1350 = 6975

I =

=

= Rs 5625

case ii) P = Rs 2500 R = 18% and T = 3 yrs

I =

=

= Rs 1350

Total Interested he earned = Rs 5625 + Rs 1350 = Rs 6975