A cube of side equal to 20 cm is open from the top. Its total surface area is __________ cm^2.
(a) 2000
(b) 2400
(c) 2500
(d) 8000
I have been asked this question by my college professor while I was bunking the class.
I need to ask this question from Surface Areas and Volumes topic in portion Surface Areas and Volumes of Mathematics – Class 9