Question

594 cubic metres of earth was dug out to sink a well .if the diameter of the well thus formed was 6m , find the depth of the well

Answer 1

$volume \: of \: cylinder = \pi {r}^{2} h$
diameter=6m
radius=6/2=3 m
$volume = 594 {cm}^{3}$
let the depth be 'h'

therefore,

$594 = \frac{22}{7} \times 3 \times 3 \times h$
$\frac{594 \times 7}{22 \times 3 \times 3} = h$
$h = 21$
therefore,
the depth (height) of the well is 21m

Answer 2

Radius of the well = 6/2 = 3m

594=22/7×3×3×h

594×7/22×3×3=h

h=21m