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dem82 [27]
3 years ago
15

How can you 83 x 57 estimate

Mathematics
2 answers:
Artemon [7]3 years ago
4 0
Hey!

You can round 83 and 57 to the closest whole numbers:

80 × 60 = 4,800

So, now you know that your answer should be close to 4,800
SVEN [57.7K]3 years ago
3 0
If you want to estimate the answer, you'll need to change the two numbers that make them easier to multiply in your head or on paper. Round 83 to 80, and 57 to 60. That makes 60 times 80; to give an estimate on paper. That would give it an estimate of around 4,800.

Hope this helps! :D
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Answer:

The time taken by smaller pipe to fill the tank alone is 74.2 min

Step-by-step explanation:

Given as :

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Now,

\dfrac{1}{x} + \dfrac{1}{y} = \dfrac{1}{49}

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Or, Applying quadratic equation method to calculate the value of y

so, y = \frac{- b \pm \sqrt{b^{2}-4\times a\times c}}{2\times a}

Or,  y = \frac{- 11 \pm \sqrt{11^{2}-4\times 1\times (-931)}}{2\times 1}

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