The volume of pyramid A is the volume of pyramid B. If the height of pyramid B increases to twice that of pyramid A, the new volume of pyramid B is the volume of pyramid A.

Given :

Two pyramid with same volume .

To Find :

If the height of pyramid B increases to twice that of pyramid A, the new volume of pyramid B .

Solution :

Volume of pyramid is given by :

Now , h'=3h

Therefore , new volume of pyramid B is 3 times the value of pyramid A .

Hence , this is the required solution .

12cm

the answer is d