A) 256sq.cm
B) 384sq.cm
C) 512sq.cm
D) 480sq.cm
Correct Answer: B
Solution :
The diagonals of a rhombus are perpendicular bisector of each other \[={{a}^{3}}\] \[=6{{a}^{2}}sq\] In right angle triangle OBC, \[=4{{a}^{2}}sq\] \[=\sqrt{3}a\]\[lbh\] \[=\sqrt{{{l}^{2}}+{{b}^{2}}+{{h}^{2}}}\] \[=2(lb+bh+hl)sq.\] \[h=2h(l+b)\] The required area \[\text{=Area of base }\!\!\times\!\!\text{ height= }\!\!\pi\!\!\text{ }{{\text{r}}^{\text{2}}}\text{ }\!\!\times\!\!\text{ h= }\!\!\pi\!\!\text{ }{{\text{r}}^{\text{2}}}\text{h}\]You need to login to perform this action.
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