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myg21
03.11.2019 •
Mathematics
The cost of painting the total outside surface of a closed cylindrical tank at 60 paise per meter squae is rs237.60. the height of the tank is six times the radius of the base of the tank, find its volume correct to two decimal places.
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Ответ:
Step-by-step explanation:
Curved surface area=
where R is radius and H is height
Since H=6R then curved surface area=![2\pi R(R+6R)=14\pi R^{2}](/tpl/images/0358/1121/70869.png)
Therefore,
Therefore, H=6R=6*3.000604=18.00362 m
Therefore,![volume=509.25 dm^{3}](/tpl/images/0358/1121/1d7bd.png)
Ответ:
63 = 9 x 7
7 is prime but 9 isn't so we need to factor again
9 = 3 x 3