(a) The volume of a cube of side 1 cm is equal to …..m3
(b) The surface area of a solid cylinder of radius 2.0 cm and height 10.0 cm is equal to…(mm)2
Answer:
(a) Expression for volume of cube is V = a3 ,
Here, a = 1cm
Therefore, V = (1 cm)3 = (10-2 m)3
V = 10-6 m3.
(b) Expression for surface area of a solid cylinder = curved area + area on top /base
= 2πrh + 2πr2
Surface area of a solid cylinder = 2πr (h + r)
Given, r = 2 cm = 20 mm and h = 10 cm = 100 mm
Putting values => Surface area = 2πr (h + r) = 2 x 3.14 x 20 (100 + 20)
Surface Area = 15072 mm2
Hence, the answer is 15072 mm2.