Question

What principal will gain Rs. 120 as simple interest at 6% per annum in 2⅔ years
(1) Rs. 650

(3) Rs. 850

(2) Rs. 750

(4) Rs. 550 ​

Answer 1

SI=₹120

Rate=6%

Time=$2\frac{2}{3}$

$= \frac{8}{3} \: years$

Let Principal=₹p

As we know

$si = \frac{p \times r \times t}{100} \\ \\ 120 = \frac{p \times 6 \times 8}{100 \times 3} \\ \\ 120 = \frac{48p}{300} \\ \\ 120 \times 300 = 48p \\ \\ \frac{120 \times 300}{48} = p \\ \\ \frac{5 \times 300}{2} = p \\ \\ 5 \times 150 = p \\ \\ p = 750$

Principal=p=₹750

$\underline{\mathbf{\huge{Principal=Rs.750}}}$

Answer 2

Answer:

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