Think a number which can be divided by 3 and 4 comes between 10 to 20. *
Answers
Answered by
1
Step-by-step explanation:
Let BC be the width of river. And ∡ of depression on either side of the river are 30
0
and 60
0
.
It is given that
AC=20 m
Let BC=x ,CD=y, ∠ABC=30
0
, ∠ADC=60
0
In △ABC,
tanB=
BC
AC
=
x
20
=
3
1
⇒x=20
3
In △ADC,tan60
0
=
y
20
y=
3
20
3
x+y=
3
80
m= width of river
Answered by
0
Answer:
12
Step-by-step explanation:
12 12 12 12 12 12 12 12 12 12
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