Question

Total surface area of 2 m 25 cm

Answer 1

Let h = 3 cm, w = 5 cm, l = 8 cm


Areahw = (h)(w) = (3 cm)(5 cm) = 15 cm2

Areahl = (h)(l) = (3 cm)(8 cm) = 24 cm2

Areawl = (w)(l) = (5 cm)(8 cm) = 40 cm2

 

Total Surface Area = 2(Areahw) + 2(Areahl) + 2(Areawl)

Total Surface Area = 2(15 cm2) + 2(24 cm2) + 2(40 cm2)

Total Surface Area = 30 cm2 + 48 cm2 + 80 cm2

Total Surface Area = 158 cm2

 

Volume = (h)(w)(l)

Volume = (3 cm)(5 cm)(8 cm)

Volume = 120 cm3