yeboi8790 yeboi8790

02-03-2021
Mathematics

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The simple interest on birr 400 invested for 4 month was birr 12. What is the annual/yearly rate of interest

Respuesta :

samuelonum1 samuelonum1

03-03-2021

Answer:

9%

Step-by-step explanation:

Given data

Principal= 400

time= 4 months

r= 12%

SI= 12

SImeple interest

12=PRT/100

susbstitute

12= (400*r*4/12)/100

12SI= 400*r*0.333/100

12=133.2r/100

cross multiply

1200= 133.2r

r= 1200/133.2

r= 9.009

Hence the rate is 9%

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