Arectangular prism has a surface area of 400 cm 2 . if it is 10 cm long and 10 cm wide, what is its height? 4 cm 5 cm 8 cm 40 cm

Hey,the answer to ur question is
A=2wl+2lh+2hw
400=2*10*10+2*10*h+2*h*10
400=200+20h+20h
400-200=20h+20h
=>200=40h
=>200/40=h
=>5=height
Therefore option(2.)is the answer to ur question
Hope this helps u...!!!

the law of definite proportions states samples of a compound will always contain the same proportion of elements by mass. in other words, a given compound will always contain the same elements in the same proportions by mass.the law of multiple proportions states when two elements combine with each other to form more than one compound, then the weights of one element that combine with a fixed weight of the other are in a ratio of small whole numbers.