Sindhuja R. answered • 04/08/20

Experienced Tutor specializing in Geometry

Volume of a Rectangular prism = L * B * H = 200

2L * ( B - 2/3 ) * ( 6H ) {Since, doubled, reduced by 2/3rd, increased by 6 }

2L * ( 3B - 2) / 3 * (6H)

4L H * ( 3B - 2)

12 LBH - 2LH

12 (200) - 2LH

Here, we need new volume of rectangular prism to get the value of LH, then by substituting LH in original volume which is LBH, we get B.

Think so the question is incomplete.