How much glass in square cm is needed for an aquarium (without a glass lid) which is 100 cm deep, 400 cm long, and 200 cm wide?

Question

How much glass in square cm is needed for an aquarium (without a glass lid) which is 100 cm deep, 400 cm long, and 200 cm wide?

Answer 1

The aquarium has 2 sides whcih measure 400cm x 100cm, 2 ends which measure 200cm x 100cm, and a bottom which measures 400cm x 200cm

 

so, 2 sides x 400cm x 100cm

     2 ends  x 200cm x 100cm

     1 bottom x 400cm x 200cm

 

Multiply the values for the 2 sides, 2 ends and the bottom, and then sum the products.