(i) Length = 3.75 m, Breadth = 4.5 m and Height = 5.1 m
Lateral / curved surface area =2h(l+b)
=2×5.1(3.75+4.5)
=10.2(8.25)
=84.15 m2
(ii) Length = 10 m, Breadth = 20 m and Height = 7 m
Lateral / curved surface area =2h(l+b)
=2×7(10+20)
=14(30)
=42 m2