Question

A box has sides with these measures: length 10 cm, width 8 cm, height h cm. If the volume is 400 cm3 , find the measure of the height. You may use the equation V = lwh as a beginning.

Answer 1

$400=10\cdot8\cdoth\\ 80h=400\\ h=5 \hbox{ cm}$

Answer 2

$V=lwh\\\\ length=l=10cm\\width=w=8cm\\ height=h\\\\ 400=10*8*h\\\\ 400=80h\ \ \ | divide\ by\ 80\\\\ h=5cm\\\\Height\ is\ equal\ to\ 5cm.$