Question

In how many years will Rs. 8000 amount to Rs. 9680 at 7% of p.a.? plzz help guys

Answer 1

prt=1680×100
t=1680÷(7×8000)×100
= 3 years
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Answer 2

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Here is your answer

Principal = Rs. 8000

Amount = Rs. 9680

Rate of interest = 7% p.a

Time = ?

Now,
As we know that,

S.I = Amount - Principal

= Rs. 9680 - 8000

= Rs. 1,680

S.I = Rs. 1,680

Now,

As we know the formula,

$time = \frac{100 \times si}{p \times r} \\ \\ = \frac{100 \times 1680}{8000 \times 7} \\ \\ = \frac{168}{56} \\ \\ = 3 \: years$

Therefore, Time is 3 years.

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