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Moti Ram Dudi

· started a discussion

· 1 Months ago

missing data???? (Question: 257197.0 )

where is de = 1 unit????

Question:

In this figure,  DEBC=14     and DE || BC and area of ∆ADE = 10 unit2, find the area  ∆DEC.

  

Options:
A)

20

B)

25

C)

30

D)

40

Solution:

Ans: (c)

  

Mukesh

· commented

· 1 Months ago

that is wrong but if you take 1:4 = 1y:4y ....after calculation as done in solution y is canceled out in last.

Dinesh Patel

· commented

· 1 Months ago

given that ratio is 1:4 , and al:lm by similar triangle

nonagerian

· commented

· 1 Months ago

ha bhai de-=1 cannot be concluded

Anuj Hatoneya

· commented

· 1 Months ago

also, how did they arrive at AL:LM=1:3? Is it some sort of property?
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