Answer:
Therefore he paid $10440 in 4 year.
Step-by-step explanation:
Given, Rachit borrowed $15000 from his friend. He gave $3000 at the rate 15% for 4 year.
Interest(I₁)= Prt here P= $3000, r=15% and t = 4 year
=$(3000×0.15×4)
=$1800
He gave $(15000-3000)= $12000 at the rate of 18%.
Interest(I₂)= Prt here P= $12000, r=18% and t = 4 year
=$(12000×0.18×4)
=$8640
Therefore he paid =$(1800+8640)=$10440 in 4 year.
