Answer:
Given
Dimentions of the rectangular prism are
Step-by-step explanation:l=5cm, b=4cm, h=3cm
If each dimension is doubled then new prism dimensions are
L=10cm, B=8cm, H=6cm
Therefore Required surface area
Total surface area(TSA) =2(LB+BH+LH)
=2[10×8+8×6+10×6]
=2(80+48+60)
=2×188
=376square cm
