In the given figure, ABAC is a right angled
triangle at A. If AE: EC = 1:2, AF: FB = 1:2
and 9(BE? + CF2) is equal to k. BC?, then the
unit digit of K2 will be
दिये गये चित्र में ABAC, A पर एक समकोण त्रिभुज है। यदि
AE: EC = 1 : 2, AF: FB = 1 : 2 तथा 9(BE + CFP)
का मान k- BC है, तब का इकाई अंक होगा
B
c
E
Answers
Answered by
5
Answer:
Given ∠B=90
∘
,AB=28cm,BC=21cm
Area of shaded region=ar△ABC+area of semicircle AC-ar quarter circle BC
=
2
1
×BC×AB+
2
1
×π(
2
AC
)
2
−
4
1
×π(BC)
2
=[
2
1
×21×28]+[
2
1
×
7
22
×
4
1
(
28
2
+21
2
)
2
]−
4
1
×
7
22
×21×21
=294+[
28
11
×1225]−346.5
=294+481.25−346.5=428.75㎠
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