Find the volume in cubic decimetre of each of the cubes whose side is (i) 1.5 m (ii) 75 cm (iii) 2 dm 5 cm
(i) Side of cube(a)= 1.5 m
∴ Volume = a3=(1.5)3m3
= 1.5×1.5×1.5m3=3.375m3
=3.375×1000=3375dm3
(ii) Side of cube (a) = 75 cm = 7.5 dm
∴ Volume = a3=(7.5)3dm3
= 421.875dm3
(iii) Side of cube (a) = 2 dm 5 cm = 2.5 dm
∴ Volume = (a)3=(2.5)3dm3
= 15.625dm3