Answer
$V_{water}$ = 6.55 x $10^{-5}$ $m^{3}$ .
Work Step by Step
Strategy: 1- Convert long, deep and high that are in. to m as the final answer is required in $m^{3}$.
Find the volume of this fish tank using formula: v = length x deep x high .
1 in. = 2.54 cm or expressed in meter 1 in. = 2.54 x $10^{-2}$ m
So long: 20.0 in. = 20.0 x 2.54 x $10^{-2}$ m = 50.8 x $10^{-2}$ m
deep: 20.0 in. = 20.0 x 2.54 x $10^{-2}$ m = 50.8 x $10^{-2}$ m
high: 10.0 in. = 10.0 x 2.54 x $10^{-2}$ m = 25.4 x $10^{-2}$ m
$V_{water}$ = length x deep x high
$V_{water}$ = 50.8 x $10^{-2}$ m x 50.8 x $10^{-2}$ m x 25.4 x $10^{-2}$ m
$V_{water}$ = 65,548 x $10^{-6}$ $m^{3}$
$V_{water}$ = 6.55 x $10^{-5}$ $m^{3}$ ( to three significant figures)