Question

No.4.a) Find the amount of money whose 56% is Rs.140.

b) Find the amount of money 0% is 75.

c) Find the amount of 28% is Rs.70.d) Find the amount of 15% is Rs.204.

Example - Let the amount = x

15% of x =Rs.20

15

100

X =Rs. 204 =

= . 204 100 = 1360

Thus the number is 1360. please answer step-by-step​

Answer 1

Answer:

4) a) The amount of money = 250

b)The amount of money = 750

c) The amount of money = 250

d) The amount of money = 1360

Step-by-step explanation:

4) a) Let 'x' be the amount of money.

56/100 × x = 140

56x/100 = 140

56x = 140 × 100

56x = 14000

x = 14000/56

x = 250

The amount of money = 250

Check ⇒

56/100 × x = 140

x = 250

56/100 × 250 = 140

56/10 × 25 = 140

28 × 5 = 140

140 = 140

L.H.S = R.H.S

Hence, verified.

The answer is correct.

b) Let 'x' be the amount of money.

10/100 × x = 75

x/10 = 75

x = 75 × 10

x = 750

The amount of money = 750

Check ⇒

10/100 × x = 75

x = 750

10/100 × 750 = 75

75 = 75

L.H.S = R.H.S

Hence, verified.

The answer is correct.

c) Let 'x' be the amount of money.

28/100 × x = 70

7x/25 = 70

7x = 70 × 25

7x = 1750

x = 1750/7

x = 250

The amount of money = 250

Check ⇒

28/100 × x = 70

x = 250

28/100 × 250 = 70

28/10 × 25 = 70

28/2 × 5 = 70

14 × 5 = 70

70 = 70

L.H.S = R.H.S

Hence, verified.

The answer is correct.

d) Let 'x' be the amount of money.

15/100 × x = 204

3x/20 = 204

3x = 204 × 20

3x = 4080

x = 4080/3

x = 1360

The amount of money = 1360

Check ⇒

15/100 × x = 204

x = 1360

15/100 × 1360 = 204

15/10 × 136 = 204

3/2 × 136 = 204

3 × 68 = 204

204 = 204

L.H.S = R.H.S

Hence, verified.

The answer is correct.

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Answer 2

$\huge\star{\underline{\mathtt{\red{A}\pink{N}\green{S}\blue{W}\purple{E}\orange{R}}}}⋆$

a) 90m as a percent of 3 km

3 km = 3000m

$\begin{gathered}\frac{90}{3000} \times 100 \\ = \frac{9}{3} \\ = 3\%\end{gathered}$ =39=3%

b) 120 grams as a percent of 2 kg

2kg = 2000 g

$\begin{gathered}\frac{120}{2000} \times 100 \\ = \frac{12}{2} \\ = 6\%\end{gathered}$2000120×100=212=6%

c) 9 hours as a percent of 1 day

1 day = 24 hours

$\begin{gathered}\frac{9}{24} \times 100 \\ = \frac{3}{8}$ \times 100 \\ = \frac{3}{4} \times 50 \\ = \frac{ 3 }{2} $\times 25 \\ = 1.5 \times 25 \\ = 37.5\%\end{gathered}249×100=83×100=43×50=23×25=1.5×25=37.5%$

d) 28 p as a percent of 1.40 rs

1.40 rs = 140 p

$\begin{gathered}\frac{28}{140} \times 100 \\ = \frac{28}{14} \times 10 \\ = 2 \times 10 \\ = 20\%\end{gathered}14028×100=1428×10=2×10=20%$

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