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ivanzaharov [21]

3 years ago

8

Kaitlyn is sharpening a pencil that is 19 cm. Each time she sharpens it goes down 2.5 cm. If she sharpens her pencil 4 times. Ho

w many centimeters of pencil does she have left?

1 answer:

Natasha2012 [34]3 years ago

7 0

Answer:

9 cm

Step-by-step explanation:

2.5x4=10

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Ann [662]

Answer:

$h=30$

Step-by-step explanation:

Volume of a cone=1540 $cm^{3}$ , Radius=7cm.

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When we need to find the height of a cone, we can use the formula of the volume of a cone, which is $\frac{1}{3} \pi r^{2} h$ to find the height of a cone.

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Put the pi value=22/7 and the value of radius which is 7 cm into the formula.

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Move $\frac{154}{3}$ to another side. 1540 divided by $\frac{154}{3}$ to calculate what is the value of h, h is the height of a cone. Like this.

$\frac{1540cm^{3} }{\frac{154}{3} } =h$

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