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Question

Find in the meter the height of a pile of 25 books if each book is 3cm5mm thick.


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Solution

Step 1: Find the height of the book pile in millimeters.

We are given the height of each book as 3cm5mm

We know,

1cm=10mm

Now calculate the height of one book.

3cm=30mm3cm5mm=30mm+5mm3cm5mm=35mm

The height of a pile of25 books will be given by

25X35=875mm

Step 2: Convert the height into meters.

We know, 1mm=0.001m

1mm=0.001m875mm=0.001X875m875mm=0.875m

Hence, the height of 25 piles of books is0.875m.


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