find number of bricks
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In your question length of brick is given 125.5cm
anf I think it should be 12.5cm
I solved your question according to given measurement.
If answer doesn't match then just change the lenghth of brick into 12.5 cm and calculate the volume of one brick then divide it by total value of 3 stair-steps.
Then total brick need =144 brick.
I hope it will help you.
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