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shusha [124]
3 years ago
15

Krishna buy some oranges at the rate of 10 for Rs 200 and an equal number at 12 for Rs 300 he mixes both oranges together and se

ll them at 15 for Rs 450 find his profit percentage or loss percentagel​
Mathematics
1 answer:
Art [367]3 years ago
4 0

Answer:

  33 1/3% profit

Step-by-step explanation:

Suppose Krishna buys 60 oranges at each price. At the first price, Krishna pays ...

  60·(Rs 200)/10 = Rs 1200

At the second price, Krishna pays ...

  60·(Rs 300)/12 = Rs 1500

At the selling price, Krishna receives ...

  120·(Rs 450)/15 = Rs 3600

__

Krishna has paid a total of 1200 +1500 = 2700 for the oranges, and sold them for 3600. His profit percentage is ...

  (3600/2700 -1) × 100% = 33 1/3%

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For a certain bathtub, the hot water faucet can fill the tub in 12 minutes. The cold water faucet can fill the tub in 8 minutes.
Fofino [41]

If both faucets are used together, it time taken by them to fill the tub is 4.8 minutes.

<h3>What is the concept of time and work?</h3>

Time and work share a fundamental idea in common with other arithmetic topics, namely the idea of proportionality.

When the amount of work is constant, efficiency is inversely proportional to the length of time required.

Important Time and Work Formula:

  • Work Done = Time Taken × Rate of Work.
  • Rate of Work = 1 / Time Taken.
  • Time Taken = 1 / Rate of Work.
  • If a piece of work is done in x number of days, then the work done in one day = 1/x.
  • Total Wok Done = Number of Days × Efficiency.
  • Efficiency and Time are inversely proportional to each other.

Calculation for the time taken by both faucet to fill the tub.

The unit should be tub per minute.

Then, do the reciprocal of the result to have minute per tub.

The hot water faucet can fill the tub in 12 minutes.

The cold water faucet can fill the tub in 8 minutes.

The filling rate for both faucets filling the tub at the same time is the sum of their rates.

Let 't' be the time taken by both faucets.

Then,

\frac{1}{12} +\frac{1}{8} =\frac{1}{t}

\frac{8+12}{8*12} =\frac{1}{t}

\frac{1}{t} =\frac{20}{96}

\frac{t}{1} =\frac{96}{20}

t = 4.8

Therefore, the time taken by both faucets to fill the tub is 4.8 minutes.

To know more about the formula for calculating power, here

brainly.com/question/20290932

#SPJ4

3 0
2 years ago
A local​ eat-in pizza restaurant wants to investigate the possibility of starting to deliver pizzas. The owner of the store has
gavmur [86]

Answer:

Step-by-step explanation:

The owner of the store has determined that home delivery will be successful if the average time spent on the deliveries does not exceed 34 minutes. This is the null hypothesis. It is written as

H0 : µ ≤ 34

The alternative hypothesis would be

Ha : µ > 34

This is a right tailed test because of the greater then symbol in the alternative hypothesis. Since the p value for the test was found to be 0.0281281, if we use a significant level of 0.05, then the conclusion would be

Reject the null hypothesis. Therefore, At a 5% level of significance, the sample data showed significant evidence that the average time spent on the deliveries does exceed 34 minutes.

6 0
4 years ago
What is 3/7 of 49? And how do you get the answer?
Alexus [3.1K]

Answer: 21 goodluck

Step-by-step explanation:

3 0
3 years ago
Read 2 more answers
Select all expressions that can be subtracted from 9x to result in the expression 3x+5.
Arte-miy333 [17]
<h2>Answer:</h2><h2>The expressions that can be subtracted from 9x to result in the expression 3x+5 is 6x - 5</h2>

Step-by-step explanation:

To find the expression that can be subtracted from 9x to result in the expression 3x+5.

Let us consider the expression, a - b = c

Here a = 9x

the result, c = 3x + 5

b = ?

Substitute the values in the above equation, we get

9x - b = 3x + 5

9x - (3x + 5) = b

b = 6x - 5

5 0
3 years ago
How do you solve a system of equation?
Eva8 [605]

Just subtract and then add then you should get your answer.

3 0
3 years ago
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