The base of a cuboidal cake has the dimensions 20 × 30 , and its surface area is 2200 2
. A layer of
icing is added to the top which has surface area 1400 2
. Find the surface area of the finished product
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Answer:
Step-by-step explanation:
Answer: Side of cube = 10 cm, for cuboid: l = 12.5 cm, b = 10 cm, h = 8 cm
Lateral surface area of cube = 4 × Side2
=
4
×
10
2
=
400
sq cm
Lateral surface area of cuboid
=
2
h
(
l
+
b
)
=
2
×
8
(
12.5
+
10
)
=
16
×
22.5
=
360
sq cm
Difference = 400 – 360 = 40 sq m
Hence, lateral surface area of cube > lateral surface area of cuboid
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