Shamita took a loan at simple interest rate of 6 p.c.p.a in the year and it increased by 1.5 p.c.p.a every year. If she pays Rs. 8,190 as interest at the end of 3 years, what was her loan amount ?

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Shamita took a loan at simple interest rate of 6 p.c.p.a in the year and it increased by 1.5 p.c.p.a every year. If she pays Rs. 8,190 as interest at the end of 3 years, what was her loan amount ?

ARs. 36000

BRs. 35400

CRs. 36800

DNone of these

upendra ? undefined

Correct answer is: None of these

Explanation:

Let the loan amount be Rs.x,

Therefore, 8190

\(\Large \frac{x \times 6 \times 1}{100}+\frac{x \times 7.5 \times 1}{100}+\frac{x \times 9 \times 1}{100}\)

\(=>\Large \frac{22.5x}{100} = 8190 \)

\(=> x = \Large \frac{8190 \times 100}{22.5}\)= Rs.36400

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A man buys a single apple for Rs. 25. If he were to buy a dozen apples, he would have to pay a total amount of Rs. 250. What would be the approximate percent discount he would get on buying a dozen apples?

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A man buys a single apple for Rs. 25. If he were to buy a dozen apples, he would have to pay a total amount of Rs. 250. What would be the approximate percent discount he would get on buying a dozen apples?

A32

B20

C12

D17

Nithin ? undefined

Correct answer is: 17

Explanation:

According to the question,

Cost of one apple = Rs. 25

∴ Cost of 12 apples = 25 × 12= Rs.300

∴ Amount paid = Rs. 250

∴ Discount = 300 - 250 = Rs. 50

% Discount = \(\frac{{50 \times 100}}{{300}} = 17{{\% \;}}\left( {{\text{approx}}.} \right)\)

∴ The required answer is 17%

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The ratio of the age of' Tina and Rakesh is 9 : 10 respectively. Ten years ago the ratio of their age was 4 : 5 respectively. What is the present age of Rakesh?

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The ratio of the age of' Tina and Rakesh is 9 : 10 respectively. Ten years ago the ratio of their age was 4 : 5 respectively. What is the present age of Rakesh?

A25 years

B20 years

C30 years

D24 years

Nithin ? Aug 14 '2022 at 21:22

Correct answer is: 20 years

Explanation:

Let the present age of Tina and Rakesh be 9x and 10x years respectively.

10 years ago.

\(=\Large \frac{9x-10}{10x-10}=\frac{4}{5}\)

\(\implies 45x - 50 = 40x - 40\)

\(\implies 5x = 10 \implies x = \frac{10}{5} = 2\)

Therefore, Rakesh's present age = 10x

\(=\Large 10 \times 2 = 20 \text{ years}\)

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The ratio of the number of students studying in school A, B and C is 5 : 8 : 4 respectively. If the number of students studying in each of the school is increased by 20%, 25% and 30% respectively, what will be the new respective ratio of the students in school A, B and C?

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The ratio of the number of students studying in school A, B and C is 5 : 8 : 4 respectively. If the number of students studying in each of the school is increased by 20%, 25% and 30% respectively, what will be the new respective ratio of the students in school A, B and C?

A3 : 25 : 15

B20 : 25 : 13

C15 : 25 : 13

DCannot be determined

Nithin ? Aug 12 '2022 at 21:48

Correct answer is: 15 : 25 : 13

Explanation:

Required ratio

\(\Large \frac{5 \times 120}{100}:\frac{8 \times 125}{100}:\frac{4 \times 130}{10}\)

\(\Large 5 \times 120 :\ 8 \times 125 :\ 4 \times 130\)

\(= 15 : 25 : 13\)

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Which of the following represents ab = 64 ?

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Which of the following represents ab = 64 ?

A8 : a = 8 : b

Ba : 16 = b : 4

Ca : 8 = b : 8

D32 : a = b : 2

Nithin ? Aug 12 '2022 at 21:17

Correct answer is: 32 : a = b : 2

Explanation:

\(\Large \frac{32}{a}=\frac{b}{2} => ab = 64\)

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