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Jagdish Yadav

· started a discussion

· 1 Months ago

Data discrepancy (Question: 233260.0 )

This answer can only be gotten through concept of similarity, which should't be the case. If we go by Pythagoras answer is totally different.
Please do the needful.

Question:
Suppose \(\Delta\)ABC be a right-angled triangle where \(\angle \)A = 90o and AD \(\perp \) BC. If \(\triangle\)ABC = 40 cm², \(\triangle\)ACD = 10 cm² and \(\overline{AC}\) = 9 cm, then the length of BC is:  
Options:
A) 12 cm 
B) 18 cm
C) 4 cm
D) 6 cm
Solution:

Ans: (b)

Subhu Kumar

· commented

· 1 Months ago

All conditions have to be satisfied, using Pythagoras theorem , u r just satisfying that ABC is a right angled triangle and one of its side is 9cm. What about area of ACD being 10? If we go by similar triangle concept then all conditions satisfied. Isliye bcgiri mat karo, aur similar triangle concept use karo

Sohil Rajput

· commented

· 1 Months ago

padega chata

Satish Kumar

· commented

· 1 Months ago

not wrong next in pythagorus theorem

Arpit Shrivastava

· commented

· 1 Months ago

Yes true...by Pythagoras theorem, answer comes to be different. ...thats a wrong question
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