Q: In a right-angled triangle ABC such that ∠ BAC = 90º and AD is perpendicular to BC. If the area of ∆ABC is 63 cm², area of ∆ACD = 7 cm², and AC = 5 cm, then the length of BC is equal to : एक समकोण त्रिभुज ABC इस प्रकार है कि ∠BAC = 90º है और AD, BC पर लंबवत् है। यदि ∆ABC का क्षेत्रफल 63 cm² है, ∆ACDका क्षेत्रफल= 7 cm² है, और AC = 5 cm है, तो BC की लम्बाई ___________ होगी।
A.
18 cm
B.
15 cm
C.
10 cm
D.
12 cm
Correct Answer:
Option B -
Explanations:
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