A man sells calculator at the rate of Rs.250 each which includes a profit of 14 per cent. What amount of profit will he earn in 19 days if he sells seven calculators per day?

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A man sells calculator at the rate of Rs.250 each which includes a profit of 14 per cent. What amount of profit will he earn in 19 days if he sells seven calculators per day?

ARs.4665

BRs.4565

CRs.4545

DNone of these

Nithin ? Aug 2 '2022 at 7:49

Correct Answer is: None of these

Explanation:

\(\text{Profit on one calculator = Rs. }\Large \left(250 \times \frac{14}{114}\right)\)

\(\therefore \text{ Total profit = } \Large \frac{7 \times 19 \times 250 \times 14}{114} \text{ = Rs. 4083.}\)

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Amit's present age is three times pratibha's present age and nine thirteenth of his father's present age. The sum of the present age of all of them is 150 years. What is the difference between pratibha's present age and Amit's father's present age ?

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Amit's present age is three times pratibha's present age and nine thirteenth of his father's present age. The sum of the present age of all of them is 150 years. What is the difference between pratibha's present age and Amit's father's present age ?

A56 years

B64 years

C60 years

DCannot be determined

Nithin K ? May 24 '2017 at 21:50

Answer is  60 years

Explanation:

Pratibha’s present age = x years

Amit’s present age = 3x years

Father’s present age

\(= \frac{3x \times 13}{9} = \frac{13x}{3} years\)

\(\therefore x + 3x + \frac{13x}{3}= 150\)

=> 3x + 9x + 13x = 150 × 3

=> 25x = 150 × 3

=> \(= \frac{150\times3}{25}= 18\)

\(\text{Required difference }\)

\(=\frac{ 13x}{3}- x = \frac{10x}{3}\)

\(= \frac{10}{3}× 18 = 60 \text { years}\)

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