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A sum of SI becomes Rs 7890 in 3 years and Rs 10410 in 7 years . Find the sum and the rate of interest .PLEASE ANSWER FAST AS POSSIBLE......I WILL MARK U AS BRAINLIST IF U WILL GIVE THE RIGHT ANSWER​

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Answer:

Amount in 3years=7890rs

Amount in 7years=10410rs

on subtracting, we get

S.I for 4 years=10410-7890

=2520rs

S.I for 3 years=2520/4×3

=1890rs

sum =7890-1890

=6000rs

now,

sum=6000

S.I=1890

time=3 years

rate =1890×100/6000×3

= 10..5 percent

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