Question

4. A field is in the shape of a rectangle whose length is 150 m and breadth is 85 m. Find the cost of fencing the field at 20 per metre. Ans. in full sollution​

Answer 1

Answer:

$125.067

Step-by-step explanation:

(150×2) + (85×2)

= 470

therefore , 470 × 20

4700.

4700 rupees = $ 125.067

Answer 2

Answer:

Let the Height of the Tree =AB+AD

and given that BD=8 m

Now, when it breaks a part of it will remain perpendicular to the ground (AB) and remaining part (AD) will make an angle of 30

o

Now, in △ABD

cos30

o

=

AD

BD

⇒BD=

2

3

AD

⇒AD=

3

2×8

also, in the same Triangle

tan30

o

=

BD

AB

⇒AB=

3

8

∴ Height of tree =AB+AD=(

3

16

+

3

8

)m=

3

24

m=8

3

m