Question

calculate the external surface area of a rectangular prism with dimensions :20m, 25m, 40m

Answer 1

Answer:

Total surface are= 2(bh+lb+lh)

= 2(20+25+40)m²

= 2× 85m²

= 170m²

Answer 2

Step-by-step explanation:

length = 20

breadth = 25

height = 40

TSA of cuboid = 2(lb+bh+hl)

=2(20×25+25×40+40×20)

=2(500+100+800)

= 2(1400)

=4800 m sq