Question

1. The height of a bookshelf is 30 cm. Three dictionaries of thicknesses 6 cm 4 mm, 7 cm 2 mm and 5 cm 5 mm are placed one on top of the other on the shelf. How much space is left above the dictionaries?​

Answer 1

Answer:

10cm 9mm

Step-by-step explanation:

6cm4mm=6.4cm

7cm2mm=7.2cm

5cm5mm=5.5cm

so, as the height of the self is 30cm and the books are kept one on top of the other

so,space left above = 30-(6.4+7.2+5.5)

=30-19.1=10.9cm

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Answer 2

Answer:

10 cm 9 mm

Step-by-step explanation:

6cm4mm=6.4cm

7cm2mm=7.2cm

5cm5mm=5.5cm

so, as the height of the self is 30cm and the books are kept one on top of the other

so,space left above = 30-(6.4+7.2+5.5)

=30-19.1=10.9cm

Hope it helps you.