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Gautam travels 160 kms at 32 kmph and returns at 40 kmph. Then average speed is

How to find the integral sides of a triangle?

In the video for altitude,inradius & circumradius (geometry-triangles), the last example states that since tri.APQ~tri.ABC smaller radius:larger radius =1/3. But acc to theorem AP/AB=AQ/AC=PQ/BC=AR/AD=1/3.How can the radius be calculated?

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how can i improve score in english

Madam, I have NC OBC certificate as dated: 18.11.2015. Now is it valid for application? Can I upload this document?

language Hindi

i join the lrdi course but the videos are different as you show them earlier.

can ntpc test in computer?

384 :? : : 216 : 63