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Workbook

EXAMPLE 11: Burcu rides his bike for 6 km and gets a flat tire. Then she has to walk with bike for
another km. Her speed walking is 6 kmph less than her speed riding the bike. If the total time is 1 hr,
find her speed riding the bike and her speed walking.

Solving Mixture Problem

EXAMPLE 12: A solution contains 4 milliliters of alcohol an 20 milliliters of water. If another solution is
to have the same ratio of milliliters of alcohol to milliliters of water and must contain 25 milliliters of
water, how much alcohol should it contain?

Solving Problem Involving Work

EXAMPLE 13: Semih can wallpaper a bathroom in 3 hr. Samet can wallpaper the same bathroom in 5
hr. How long would it take them if they work together?

EXAMPLE 14: It takes a child 3 times longer to vacuum a house than an adult. If it takes 1 hr for one
adult and one child working together to vacuum a house, how long would it take each person working
alone?

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