A) Rs. 84
B) Rs. 140
C) Rs. 168
D) none of these
Correct Answer: C
Solution :
Diagonals of a rhombus bisect each other at \[90{}^\circ .\] In \[\Delta OAB,\]\[OB=\sqrt{{{5}^{2}}-{{4}^{2}}}=3\,cm\] \[\therefore \] \[BD=2\times OB=2\times 3=6\,cm\] \[\therefore \] Area of ABCD\[=\frac{1}{2}\times 8\times 6=24\,c{{m}^{2}}\] Now, the cost of painting \[=2\times 3.50\times \]area of rhombus ABCD \[=2\times 3.50\times 24\] \[=\text{Rs}\text{.}\,168\]You need to login to perform this action.
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