Question

-what sum of money will amount to rs.4320 in 2 and 1/2 years at 7%per annum simple interest.​

Answer 1

Answer:

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Answer 2

GIVEN

• Amount = Rs. 4320
• Time = 2 and 1/2 or 5/2 years
• Rate = 7%

TO FIND

• Principal (sum)

FORMULA

$Amount = P + I$

$Simple\: Interest =\frac{P×R×T}{100}$

• P - Principal
• T - Time
• R - Rate

Let, The Principal be P

ACCORDING TO QUESTION

$Simple\: Interest =\frac{P×R×T}{100}$

$S.I. = \frac{P × 7 × 5}{2×100}$

$S.I. = \frac{35P}{200}$

$S.I. = \frac{7P}{40}$

NOW

$Amount = P + I$

$4320 = P + \frac{7P}{40}$

$4320 = \frac{40P + 7P}{40}$

$4320 = \frac{47P}{40}$

$4320 ×\frac{40}{47}= P$

$3676.6 =P$

Principal = Rs 3676.6

HOPE THIS ANSWER WILL HELP YOU!!