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Kriti took a loan at simple interest rate of 6% in the first year with an increase of 0.5% in each
subsequent year. She paid interest of 3,375 after four years. How much loan did she take?
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Answer:
let principal be rs. p
then
si=prt/100
=p×6×1/100
=6p/100 for 1st year
for second year
=p×13×1/100×2
13p/200
for 3rd year
p×7×1/100
=7p/100
for 4th year
p×15/100×2
=15p/200
6p/100+13p/200+7p/100+15p/200
=(12+13+14+15)p/200
=54p/200=3375
p=3375×200/54
rs12500
kriti take rs 12500 as loan
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