Math, asked by trojan123, 1 year ago

plz answer the 12,13 and 14th question

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Answered by Anonymous
1

Answer:


Step-by-step explanation:

12. Area of trapezium= 1/2*d*(a+b) sq. Units.

Where d= perpendicular distance between parallel sides which are a & b respectively, 25 &13 cm.

25–13=12, 12/2= 6 cm is base of RT. Angled ∆.

Non parallel sides=10cm, this is hypotenuese of this ∆.

Find ‘d ‘ to solve.

d=√{10^2–6^2}=8 cm.

Area of trapezium= 1/2*8*(25+13)=152 cm^2


13.  Consider a Triangle ACD

it is right angled triangle therefore by pythagoras theorem

AC^2 = AD ^2 +DC^2

41^2 = AD^2 +40^2

1681 = AD^2 +1600

AD^2 = 81

AD = 9cm

Therefore the perpendicular height of trapezium is 9 cm

Now by formula

Area of trapezium = 1/2 × sum of lengths of parallel sides × height

=1/2 × (15 +40) × 9

=1/2 ×55 ×9

=495 /2

=247.5 sq. cm


14.  Solution :-


Area of the Δ DEI = 1/2 × Base × Height


⇒ 1/2 × 60 × 40

 

= 1200 sq m


Area of the Trapezium EFGI = 1/2 × (Sum of the two parallel sides) × Height


⇒ 1/2 × (60 + 50) × 70


⇒ 1/2 × 110 × 70


= 3850 sq m


Area of the Δ AFG = 1/2 × Base × Height


⇒ 1/2 × 50 × 50


= 1250 sq m


Area of the Trapezium ABCH = 1/2 ×(Sum of the two parallel sides) × Height


⇒ 1/2 × (40 + 30) × 80


⇒ 1/2 × 70 × 80


= 2800 sq m


Area of the Δ CDH = 1/2 × Base × Height 


The height of this figure is not clear in the image. I think it is 80 m and I have assumed it 80 m.


⇒ 1/2 × 40 × 80


= 1600 sq m


Total area = Area of Δ DEI + Area of the Trapezium EFGI + Area of Δ AFG + Area of Trapezium ABCH + Area of Δ CDH 


⇒ 1200 + 3850 + 1250 + 2800 + 1600


= 10700 sq m


So, the area of the figure ABCDEF is 10700 sq m


Thank You..

Mark me as Brainlist..


trojan123: thank you very much
Answered by ans81
0
HEY MATE HERE IS YOUR ANSWER

let us assume person buy 7 orange

his cost of 7 orange = 1

as he wants 40% profit ,

his selling price for 7 orange will be = 1+ 40% of 1= 1.4

selling price of one orange = 1.4/7 = 0.2

in 1 rupee number of orange he will sell = 1/0.2=5


trojan123: what the hell
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