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  • There is a rectangular grid of size  units, which is divided internally into 63 squares

There is a rectangular grid of size 7 \times 9 units, which is divided internally into 63 squares of 1 unit length each, then the number of rectangules that can be formed on this grid is 

Option: 1

204 


Option: 2

1140 


Option: 3

1260 


Option: 4

None of these 


Answers (1)

best_answer

In this grid,we will have 8 horizontal and 10 vertical lines (or vice versa)

To make a rectangle, we have to select 2 distinct horizontal and 2 distinct vertical lines.

This can be done in 8C2.10C2 ways, this equals 1260

Posted by

jitender.kumar

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