A) 62 units
B) 63 units
C) 64 units
D) 65 units
Correct Answer: D
Solution :
[d] |
Now \[{{h}^{2}}={{30}^{2}}-{{(80-x)}^{2}}\] |
Also \[{{h}^{2}}={{70}^{2}}-{{x}^{2}}\] |
\[\Rightarrow \,\,\,\,\,\,\,{{30}^{2}}-{{(80-x)}^{2}}={{70}^{2}}-{{x}^{2}}\] |
\[\Rightarrow \,\,\,\,\,\,\,\,\,\,\,\,160x=10400\Rightarrow x=65\]units. |
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