Friday

July 25, 2014

July 25, 2014

Posted by **Elizabeth** on Monday, December 13, 2010 at 12:29pm.

A spherical balloon has a volume of 268 cubic cm. If more air is pumped in so that its radius is 3 times as long, what is its new volume?

My answer: 2,412 cubic cm

- 8th grade math -
**Henry**, Tuesday, December 14, 2010 at 6:21pmr^3 Becomes (3r)^3 = 27r^3,

New Volume = 27 * 268 = 7236 cc.

ALTERNATE METHOD:

V = (4/3)3.14*r^3 = 268 cc,

4.1888r^3 = 268,

r^3 = 268 / 4.1888 = 63.980,

r1 = 4.

New Radius = r2 = 3r1 = 3*4 = 12cm.

New Volume:

V = (4/3)3.14*(12)^3,

V = 4.1867 * 1728 = 7235 CC.

- 8th grade math -
**konnah**, Tuesday, December 14, 2010 at 10:15pm6 negative 3

- 8th grade math -
**Jordan**, Wednesday, December 15, 2010 at 9:17pmi need help

**Related Questions**

calculus - Air is being pumped into a spherical balloon so that its volume ...

Calculus - Air is being pumped into a spherical balloon so that its volume ...

Calculus - Air is being pumped into a spherical balloon and the volume is ...

Calculus - Air is being pumped into a spherical balloon so that its volume ...

calculus - Air is being pumped into a spherical balloon so that its volume ...

math - Air is pumped into a balloon such that its volume increases at the rate ...

Calc - Air is being pumped into a spherical balloon so that its volume increases...

calculus - air is being pumped into a spherical balloon at a rate of 8 cm^3/min...

Calculus - t: 0 2 5 7 11 12 r'(t): 5.7 4.0 2.0 1.2 0.6 0.5 The volume of a ...

math-calculus - A spherical party balloon is being inflated with helium pumped ...