The area of the parallelogram represented by the
vectors A=7 î+ 3j and B = î+ 4ſ is
(a) 18 units
(b) 28 units
(c) 25 units
(d) 21 units
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Explanation:
area of parallelogram =A×B
(7i +3j +0k)×(i +4j+0k)
for i component we have ,
=(3×0 - 4×0)
=0
for j component
=(7×0-0×1)
=0
for k component
=(7×4 -3×1)
=25
A×B = whole root of 0^2+0^2+25^2
= 25 unit
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