sushama diposited rp. 6500 which amounted to rp 7800 in 4 year at simple interest. had the interest been 2% more per annum how much would she received?
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P=6500
A=7800
N=4
R=?
SI=A-P=7800-6500=1300
Si=PNR/100
1300=6500*4*R/100
13=65*R/25
13*25=65R
R=5%
according to question interest is Increased by 2%
this implies R=old R+2=5+2=7%
SI=6500×7×4/100
SI=65×28
SI=1820
A=6500+1820=8320
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