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zmey [24]
3 years ago
11

A candle maker has rectangular block of paraffin that is 4 centimeter high by 8 centimeter long by 6 centimeter wide. He melts i

t into a cone-shaped candle that is 5 centimeter wide at the base and 25 centimeter tall. Does the candle use all the paraffin from the original block?justify your reasoning
Mathematics
1 answer:
Veronika [31]3 years ago
5 0

Answer:

The candle will not use all the paraffin from the original block.

Step-by-step explanation:

The cone-shaped candle is 5 cm wide at the base i.e. the diameter of the base is 5 cm i.e. radius is 2.5 cm.

If the height of the cone is 25 cm, then total volume of the cone shaped candle is  

\frac{1}{3}\pi  r^{2} h

= \frac{22 \times 2.5^{2} \times 25 }{3 \times 7}

= 163.69 cubic cm.

Again, the volumes of the rectangular block of paraffin is (4 × 8 × 6) = 192 cubic cm.

Since, 192 > 163.69

Therefore, the candle will not use all the paraffin from the original block.

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A room covers 299.6 square feet. A painter paints the room in three days. The first day he covers 2/7 of the area. The next day
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<em>On day the he covers </em>128.4 ft²

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