Word Sums
Pandug
Exercise 16E?
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?
Answers
10 cm 9 mm of space is left above the dictionaries.
Step-by-step explanation:
The height of the book shelf = 30 cm
The thickness of the 3 dictionaries are:
6 cm 4 mm = (6 + 0.4) cm = 6.4 cm
7 cm 2 mm = (7 + 0.2) cm = 7.2 cm
5 cm 5 mm = (5 + 0.5) cm = 5.5 cm
It is given that the three dictionaries are kept on top of the other on the shelf, therefore,
The total space covered by the 3 dictionaries = 6.4 + 7.2 + 5.5 = 19.1 cm
Thus,
The space left above the dictionaries on the shelf is,
= [Height of the bookshelf] - [Total space covered by the dictionaries]
= 30 cm - 19.1 cm
= 10.9 cm
= 10 cm 9 mm
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