find the surface area and the volume of x cube of an area
(i)9cm
(ii)4.5cm
(iii)12.6cm
Answers
Answer:
1.486cm sq
2.121.5cm²
Step-by-step explanation:
1. area is equal to 6 times and the square of one side
a=6×9×9=486cm sq.
2.side=4.5cm
volume =s³=(4.5)³=91.125m³
sum of surface area of vertical faces 4a²
= 4 x 4.5 X 4.5
= 9×9
=81cm²
total surface area is 6a²
=6×4.5×4.6
=9×13.5
=121.5 cm²
Answer:
i) sa = 486cm²
v = 729cm³
ii) sa = 121.5cm²
v = 91.125cm³
iii) sa = 952.56cm²
v = 2000.376cm³
Step-by-step explanation:
i) s = 9cm
surface area = 6s²
= 6 x 9 x 9
= 486cm²
volume = s³
= 9 x 9 x 9
= 729cm³
ii) s = 4.5cm
surface area = 6 x 4.5 x 4.5
= 121.5cm²
volume = 4.5 x 4.5 x 4.5
= 91.125cm³
iii) s = 12.6cm
surface area = 6 x 12.6 x 12.6
= 952.56cm²
volume = 12.6 x 12.6 x 12.6
= 2000.376cm³