mamas1401
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A rock is dropped into a graduated cylinder containing 40mL of water. the new volume is 47mL. What is the volume of the rock? a)4ml b)47ml c)7ml d)87ml e)11ml

I thibk it is 7ml am I correct ?

Verified Answer :

sidneyboker

To find the volume of irregularly shaped objects, you put them in graduated cylinders, as described. To find the volume of the object, get the difference between the original volume and the new volume. 
So, its 47mL - 40mL, which equals 7, so choice c) 7mL, the answer you picked!

The volume of the rock is 7mL. The correct option is c)7ml

From the question,

We are to determine the volume of the rock.

When an object is submerged in a container containing a liquid, the submerged object displaces a volume of liquid equal to the volume of the object.

That is,

Volume of object = Final volume - Initial volume

From the given information,

Initial volume = 40mL

Final volume = 47mL

∴ Volume of the rock = 47mL - 40mL

Volume of the rock = 7mL

Hence, the volume of the rock is 7mL. The correct option is c)7ml

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