Question

If the perimeter of one of the faces of a cube is 40 cm, then its lateral surface area is: (a) 400 sq.cm(b) 1600 Sq. cm (c) 4000 sq.cm (d) 600 sq.cm​

Answer 1

Step-by-step explanation:

ALL FACES OF A CUBE HAVE

WITH EQUAL LENGTH

SO..AREA OF ONE FACE (SQUAR SHAPED) = 4×LENGTH

AREA=40=4×LENGTH

THUS KENTH=40/4=10CM

EDGE OF THE CUBE=10CM

LATERAL SURFACE AREA = 4× (EDGE)^2

= 4×100

LATERAL SURFACE AREA OF CUBE =400CM^2

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