Question

Think a number which can be divided by 3 and 4 comes between 10 to 20. *​

Answer 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

Answer 2

Answer:

12

Step-by-step explanation:

12 12 12 12 12 12 12 12 12 12