Question

Find the total number of rectangle possible in the given L'shaped grid.

Answer is 900, provide explanation and solution.​
koi hai kya .​

Answer 1

Answer:

Find the total number of rectangle possible in the given L'shaped grid.

Answer is 900, provide explanation and solution.

koi hai kya .

Answer 2

Answer:

Step-by-step explanation:

In a simple rectangle of m × n dimension , total number of rectangles are

Think of this like choosing vertexes of rectangles from m + 1 and n + 1 options ( count number of lines they will be one more then boxes ).

Now First take 10 × 4 vertical portion , total no. of rectangles in it will be

Now take 9 × 4 horizontal portion , rectangles in it are

But note that rectangles those are in common area of 4 × 4 has been counted twice , such rectangles are

So we will minus these rectangles I.e. require

number of rectangles will be

Explanation:

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