Question

PLZZZZ STEP BY STEP ANSWER​

Answer 1

Answer:

To find simple interest,

S. I = P×R×T /100

Step-by-step explanation:

(a) 1800×5×1/100

=90 (S.I)

To find amount,

Principal + Simple interest

= 1800+90

=1890

b) P×R×T/100

= 2600 ×12×3

= 936

Amount = S. I + principal

= 936+ 2600

= 3536

Others you can do yourself..using the same formula given above..

Hope it Helps..

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Answer 2

Simple Interest (S.I.) = (P x R x T) / 100 and, formula for calculating Amount (A) = P + SI

1. Find the simple interest and amount in each of the following:

(a) P = $1800, R = 5%, T= 1 year

(b) P = $2600, R = 12%, T= 3 years

(c) P = $3125, R = 15%, T = 73 days

(d) P = $5660, R = 11%, T= 9 months

(e) P = $180, R = 3%, T = 1 ¼ year

$\rule{300}{1.5}$

Solution :

(a). P = $ 1800, R = 5%, T = 1 year

⇒ $\sf{S.I.=\dfrac{(P \times R \times T)}{100}}$

⇒ $\sf{S.I.=\dfrac{(1800 \times 5 \times 1)}{100} = 90}}$

★ A = P + SI

⇒ 1,800 + 90 = 1,890

⇒ A = 1,890

⇒ SI = 90

$\rule{300}{1.5}$

(b). P = $2600, R = 12%, T= 3 years

⇒ $\sf{S.I.=\dfrac{(P \times R \times T)}{100}}$

⇒ $\sf{S.I.=\dfrac{(2600 \times 12 \times 3)}{100} = 936}$

★ A = P + SI

⇒ 2,600 + 936 = 3,536

⇒ A = 3,536

⇒ SI = 936

$\rule{300}{1.5}$

(c). P = $3125, R = 15%, T = 73 days

⇒ $\sf{S.I.=\dfrac{(P \times R \times T)}{100}}$

⇒ $\sf{S.I.=\dfrac{(3125 \times 15 \times 0.2)}{100} = 93.75}$

★ A = P + SI

⇒ 3,125 + 93.75 = 3,218.75

⇒ A = 3,218.75

⇒ SI = 93.75

$\rule{300}{1.5}$

(d). P = $5660, R = 11%, T= 9 months

⇒ $\sf{S.I.=\dfrac{(P \times R \times T)}{100}}$

⇒ $\sf{S.I.=\dfrac{(5660 \times 11 \times 0.75)}{100} = 466.95}$

★ A = P + SI

⇒ 5660+ 466.95 = 6126.95

⇒ A = 6126.95

⇒ SI = 466.95

$\rule{300}{1.5}$

(e). P = $180, R = 3%, T = 1 ¼ year

⇒ $\sf{S.I.=\frac{(P \times R \times T)}{100}}$

⇒ $\sf{S.I.=\dfrac{(180 \times 3 \times 1.25)}{100} = 6.75}$

★ A = P + SI

⇒ 180 + 6.75 = 186.75

⇒ A = 186.75

⇒ SI = 6.75