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MAVERICK [17]
3 years ago
8

the volume of a large sphere (of radius R) is twice the volume of a smaller sphere (of radius r). form an equation linking r and

R.
Mathematics
1 answer:
Sedaia [141]3 years ago
3 0

Step-by-step explanation:

radius of large sphere is R,

then volume is (4/3)*pie*R³

and

the radius of small sphere is r,

then volume is (4/3)*pie*r³

condition is,

volume of larger sphere is twice of the volume of smaller sphere.

then, (4/3)*pie*R³=2*(4/3)*pie*r³;

R³= 2r³

R=(2^⅓)*r

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There are 2 squares, and the ratio of their perimeters is 5:8. If the area of the first square is 225m², then what is the area o
nata0808 [166]

we know that

the ratio of the perimeters is equals to the scale factor

scale factor=5/8

scale factor=measure smaller square/measure larger square

 

let

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larger square=second square

 

area smaller square=[scale factor]²*area larger square

so

area larger square=area smaller square/[scale factor]²

scale factor=5/8

area smaller square=225 m²

area larger square=225/[5/8]²----> 225/(25/64)-- > 225*(64/25)----- > 576 m²

 

the answer is

the area of the  second square (larger square) is 576 m²


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8 0
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