Problems:
read each problem carefully make an estimate then solve to verify your estimate.
1. Fifteen liters of gasoline costs php 725.25. what is the cost per liter?
2. How much is the cost of a meter of cloth if 2 m cost php 412.50?
3. Maria types 195 words in 3 minutes.at this rate, how many words can she type in 7 minutes?
Solutions:
1.
[tex] \blue{ \frac{15}{725.25} = \frac{1}{n} }[/tex]
[tex] = \frac{725.25 \times 1}{15n} [/tex]
[tex] = \frac{725.25}{15} [/tex]
[tex] \purple{ = \boxed{48.35}}[/tex]
2.
[tex] \blue{ \frac{1}{n} = \frac{2}{412.50} }[/tex]
[tex] = \frac{1 \times 412.50}{2n} [/tex]
[tex] = \frac{412.5}{2} [/tex]
[tex] \purple{ = \boxed{206.25}}[/tex]
3.
[tex] \blue{ \frac{195}{3} = \frac{n}{7} }[/tex]
[tex] = \frac{195 \times 7} {3n}[/tex]
[tex] = \frac{1365}{3} [/tex]
[tex] \purple{ = \boxed{455}}[/tex]
Answers:
- ₱48.35
- ₱206.25
- 455 words
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