Question

Q1.On what principal, S.I of 5 years at the rate of 6 % if Rs. 90?
(a) Rs. 450 (b) Rs. 400 (c) Rs. 250 (d) Rs. 300
Q2. Find the Compound Interest on Rs. 5000 at the rate of 10 % per annum for 2 years.
(a) 1010 (b) 4000 (c) 1000 (d) 2000
Q3. In selling a plot of land for Rs. 61200, a profit of 20 % is made. The cost price of the plot is
(a) Rs. 51000 (b) Rs. 50000 (c) Rs. 49000 (d) 52000
Q4. A shopkeeper purchased 2 refrigerators for Rs. 9800 and Rs. 8200 respectively. He sold them for
Rs. 16920. Find loss %
(a) 2 % (b) 4 % (c) 5 % (d) 6 %
Q5. In a school out of 340 students, 55 % students are of Science. The remaining Students are of
Commerce. Find the number of students of Commerce.
(a) 135 (b) 153 (c) 315 (d) 140
Q6. In a mixture the amount of Zinc is 45 %. Find the amount of zinc in 400g mixture.
(a) 60 g (b) 120 g (c) 180 g (d) 200 g
Q7. A sofa set was bought for Rs. 10000. Its value depreciated at the rate of 10 % per annum. Find its
value after one year.
(a) Rs. 11000 (b) Rs. 9000 (c) Rs. 10000 (d) Rs. 1000
Q8. A bag is available for Rs. 90. The shopkeeper allows 10 % discount on marked price. What is the
marked price of bag?
(a) Rs. 100 (b) Rs. 90 (c) Rs. 110 (d) Rs. 10
Q9. The fraction 2/5 converted to percentage is
(a) 20 % (b) 30 % (c) 40 % (d) 50 %
Q10. Ramesh purchased a sewing machine for Rs. 2000. He sold it at a loss of 40 %. Find the selling
price?
(a) Rs. 1200 (b) Rs. 400 (c) Rs. 800 (d) Rs. 2800
plzz answer all answer correctly
otherwise i will report u

Answer 1

Answer:

1-,d

Step-by-step explanation:

thanks for points and like me on brainliest

Answer 2

Answer:

1. Option d is correct answer

2.Option d is correct answer

3. Option a is correct answer

4. Option d is correct answer

5. Option b is correct answer

6. Option c is correct answer

7. Option b is correct answer

8.Option a is correct answer

9. Option c is correct answer.

10. Option a is correct answer

Step-by-step explanation:

1. Simple interest of Rs. 90 in 5 years at the rate of $6 \%$.

To Find: The principal =?

Solution:

We can solve the question as follows:

It is given that a simple interest of Rs. 90 is obtained in 5 years at the rate of $6 \%$. Simple interest $= Rs. 90$

Time $=5$years Rate $=6 \%$ Principal =$= ?$

The formula for simple interest is given as:

Simple interest $=\frac{\text { Principal*Rate*Time }}{100}$

Substituting the values in the above formula,

$\begin{aligned}&90=\frac{\text { Principal } * 6 * 5}{100} \\&90=\frac{\text { Principal } * 30}{100} \\&90=\frac{\text { Principal } * 3}{10} \\&\text { Principal }=\frac{90 * 10}{3} \\&\text { Principal }=30 * 10=\text { Rs. } 300\end{aligned}$

Hence, the principal amount is Rs. 300 .

2.

We need to calculate the Compound interest

Formula of Compound interest $(\mathrm{Cl}): \mathrm{Cl}=\mathrm{A}-\mathrm{P} \Rightarrow \mathrm{A}$is Total amount

$P$ is Principal deposit

Principal deposit is Rs. 5000 but we dont know the Total amount

Formula for Total amount (A): $A=P(1+r / 100)^{n} \Rightarrow r$is annual rate

$\mathrm{n}$ is number of years

Since it is half yearly $n$ will be $2 n$

So

$\begin{aligned}&A=P(1+r / 100)^{2 n} \\&A=5000(1+10 / 100)^{2 * 2} \\&A=5000(1+0.1)^{4} \\&A=5000(1.1)^{4} \\&A=5000 * 1.4641 \\&A=R s .7320 .5\end{aligned}$

So Compound interest will be $A-P$

$7320.5-5000$

$=2320.5$

3.∵ If S.P. is $Rs 120(100 + 20),$

C.P.$= Rs 100$

∴ If S.P. is $Rs 61200$

C.P. = $\frac{100}{120} X 61200 = Rs 51000$

4. Total C.P. $= 9800 + 8200 = Rs 18000$

S.P.$= Rs 16920$

∴ Loss = $Rs 18000 - Rs 16920 = Rs 1080$

∴ Loss % $= \frac{1080}{18000} X 100\\ = 6%.$

5. Number of Science students

$= 340 X\frac{55}{100} = 187.$

∴ Number of students of Commerce

$= 340- 187 = 153.$

6. Amount of zinc = 400 × 45100 = 180 kg

7. one sofa = $Rs 10000$

decreasing value $= 10000* \frac{10}{100}$ $= Rs 1000$                            

1 year later the price $= 10000 - 1000 = Rs 9000$

8. $100 - 10 = 90 .$

If the bag is available for Rs 90, then marked price = Rs 100.

9. Convert the fraction 2/5 into decimal  $\frac{2}{5} = 0.4$

Multiply the decimal by 100: $0.4 X 100 =40%$

Therefore, the solution is 40%.

Option c is correct.

10.$M \cdot P=2000$

Discount $=40 \%$

amount of discount

$=(2000 \times \frac{40}{100} })=800$

$\begin{aligned}&S \cdot P=M P Q-Discownt } \\&S \cdot P=2000-800 \\&\Rightarrow 1200 \\&S \cdot P=1200\end{aligned}$

The selling price of the sewing machine is Rs 1200

The option a is correct