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triangle ABC is similar to triangle DEF....

`triangle ABC` is similar to `triangle DEF`. The area of `triangle ABC` is `100 cm^2` and the area of `triangle DEF` is `49 cm^2`. If the altitude of `triangle ABC`=5cm, then the corresponding altitude of `triangle DEF` is:
त्रिभुज ABC त्रिभुज DEF के समरूप है | त्रिभुज ABC का क्षेत्रफल 100 वर्ग सेमी है तथा त्रिभुज DEF का क्षेत्रफल 49 वर्ग सेमी है | यदि त्रिभुज ABC की ऊंचाई - 5 सेमी है, तो त्रिभुज DEF की संगत ऊंचाई ज्ञात करें |

A

7 cm

B

4.5 cm

C

6 cm

D

3.5 cm

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