emelynkoh
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The price of a cake of radius r сm and height h cm is given by the formula
P=
[tex] \frac{1}{25} {r}^{2} h[/tex]


If the price of cake is $240 and the height is 15 cm, calculate the radius
of the cake.


pls provide step-by-step explanation, final ans is 20 cm. tysm <33 ​

Respuesta :

fichoh

Answer:

20 cm

Step-by-step explanation:

Given that :

P = 1/25 r²h

P = price = 240 ; h = height = 15cm

Inputting values into the equation :

240 = 1/25 * r² * 15

25 * 240 = 15r²

6000 = 15r²

6000 / 15 = r²

400 = r²

Square root of both sides

20 = r

Radius = 20cm

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