Question
Sarah is blowing up spherical balloons for her brother's birthday party. The balloons have a radius of 3 inches. If she can inflate the balloon at a rate of 200 cubic in. per minute, the time it would take for the balloon to deflate is ___________.
- 0.6 min.
- 1.6 min.
- 2.5 min.
- 0.3 min.
Hint:
Calculate volume of balloon and divide it from inflation rate you get deflate time
balloon volume = volume of sphere with given radius
The correct answer is: 0.6 min.
Given the radius of Balloon/Sphere = 3 in
and , Volume = ?
Step 1 :
Volume of Sphere Formula =
step 2:
Putting values
taking pi = 3.14
Volume = = 113 in3
Step 3 :
divide volume by inflation rate to get time of deflate
= 113/200 = 0.6 min
So , it will take 6 min to deflate the balloon
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