Question

In a library there are 6 books each of thickness 30mm and 6 paper sheets each of thickness 0.018 mm. what is the total thickness?

Answer 1

total thickness of 6books=6*30=180mm total thickness of 6papersheet =6*0.018=0.108 total =180+0.108=180.108mm

Answer 2

Answer is  180.108mm.

Given : Thickness of each book = 30 mm

            Number of books = 6

            Thickness of paper sheet = 0.018 mm

             Number of paper sheets = 6

To find : Total thickness.

Solution :

Thickness of 6 books = 6 × 30 mm

                                    = 180 mm

Thickness of 6 paper sheets = 6 × 0.018 mm

                                                = 0.108

Total thickness of books and paper sheets  =  180 mm + 0.108 mm

                                                                         = 180.108 mm

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