Question

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

Answer 1

(i) Side of cube(a)= 1.5 m
$\therefore$ Volume = $a^3=(1.5{)}^3{m}^3$
= $1.5\times 1.5\times 1.5m^3=3.375m^3$
=$3.375\times 1000=3375d{m}^3$
(ii) Side of cube (a) = 75 cm = 7.5 dm
$\therefore$ Volume = $a^3=(7.5{)}^{3}d{m}^3$
= $421.875d{m}^3$
(iii) Side of cube (a) = 2 dm 5 cm = 2.5 dm
$\therefore$ Volume = $(a{)}^3=(2.5{)}^{3}d{m}^3$
= $15.625d{m}^3$