1800-150-456-789
FlagBACK
Flag 10 grade maths> i dont have rd sharma so please solve it ...
question mark

i dont have rd sharma so please solve it for me. In a trapezium ABCD, AB ll DC and DC = 2AB. EF ll AB where E and F lie on BC and AD respectively such that BE /EC = 4/3. Diagonal DB intersects EF at G . Prove that 7EF = 11AB.

RAHUL , 6 Years ago
Grade 10
anser 1 Answers
Arun

Last Activity: 6 Years ago

Dear student
given DC = 2 AB

Draw BH parallel to AD. H will be the middle point of DC as AB = DH.
Sin EF || AB,   FI = AB
The ΔBHC and ΔBIE are similar as the corresponding sides are parallel.
So  IE / HC = BE / BC
      IE = HC * BE / BC 
          = y * 4x/7x = 4 y / 7
EF = FI + IE= y + 4 y /7 = 11 y / 7
so  7 EF = 11 AB
 
Regards
Arun (askIITians forum expert)

Provide a better Answer & Earn Cool Goodies

Enter text here...
star
LIVE ONLINE CLASSES

Prepraring for the competition made easy just by live online class.

tv

Full Live Access

material

Study Material

removal

Live Doubts Solving

assignment

Daily Class Assignments


Ask a Doubt

Get your questions answered by the expert for free

Enter text here...

Other Related Questions on 10 grade maths

question mark
What are the advantages and disadvantages of mean, median and mode?
10 grade maths
1 Answer Available

Last Activity: 1 Year ago(s)

question mark
Find the sum of the first 100 natural numbers.
10 grade maths
1 Answer Available

Last Activity: 2 Year ago(s)

question mark
AOBC is a rectangle whose three vertices are A(0,-3), O(0,0) and B (4,0). The length of its diagonal is__
10 grade maths
1 Answer Available

Last Activity: 2 Year ago(s)

question mark
For an AP, it is given that first term (a)= 5 and Common Difference (d) = 3 and nth term = 50. Find n and sum of first n terms of AP
10 grade maths
1 Answer Available

Last Activity: 2 Year ago(s)

question mark
The value(s) of k for which the quadratic equation 2x^2 + kx + 2 = 0 has equal roots, is (a) 4 (b) pm 4 (c) -4 (d) 0
10 grade maths
1 Answer Available

Last Activity: 2 Year ago(s)