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3 years ago

What is the volume of the cylinder when the radius is 10 and the height is 15

Mathematics

2 answers:

Gre4nikov [31]3 years ago

4 0

Volume=pir^2*h
v=pi*10^2*15
v=4712.39u^3

avanturin [10]3 years ago

4 0

Answer:

V = π r^2 h = π · 10^2 · 15 ≈ 4712.38898

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Step-by-step explanation:

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Total number of mangoes, a trader bought = $x$

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He made a gain of 10 naira

Question asked:

Total number of mangoes, a trader bought = $x$ = ?

Solution:

Unitary method

Cost price of 4 mangoes = 10 naira.

Cost price of 1 mango = $\frac{10}{4}$

Cost price of $x$ mango = $\frac{10}{4}\times x= \frac{5}{2} x$

As 5 of the mangoes were bad and he sold the remaining mangoes, then Total number of mangoes sold = $x-5$

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Sale price of 1 mango = $\frac{20}{5}$

Sale price $x-5$ of mango = $\frac{20}{5}\times(x-5)=4(x-5)=4x-20$

Now, as we know,

$Gain = Sale price - cost price$

$10 = 4x-20 -\frac{5}{2} x\\ 10=4x-\frac{5}{2} x-20\\10=\frac{8x-5x}{2} -20$

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$30=\frac{3x}{2}$

Multiplying both sides by 2

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$x=20$

Therefore, total number of mangoes, a trader bought is 20.

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