Question 68

Anvi is making bookmarker like the one shown in the given figure. How many bookmarkers can she make from a 15 m long ribbon?

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Solution

Height of one bookmarker $= 10 \frac{1}{2} c m$
$= \frac{(10 \times 2) + 1}{2} = \frac{21}{2} c m$
Length of ribbon = 15m = 1500 cm
$∴$ Number of bookmarker $= \frac{L e n g t h o f r i b b o n}{H e i g h t o f o n e b o o k m a r k e r}$
$= \frac{1500}{\frac{21}{2}} = \frac{1500}{21} \times 2 = 142.85 = 142$

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