Answer:
New volume will become 187.5 inch²
Step-by-step explanation:
Initial volume,
V = lbh
Put all the values,
V = 6.25 × 2.5 × 6
V = 93.75 inch³
When the length is doubled, l' = 2(6) = 12 inch
New volume,
V' = 12 × 6.25 × 2.5
= 187.5 inch²
So, when the length is doubled, the new volume will become 187.5 inch².