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Tutorial ID | Title | Tutorial | Video Tutorial | Revision Notes | Revision Questions | |
---|---|---|---|---|---|---|
4.3 | Proportion |
1. . Which of the following proportions is true?
Correct Answer: B
2. . Which of the following ratios or rates are NOT a proportion?
Correct Answer: D
3. . Which of the following ratios or rates are inversely proportional to each other?
Correct Answer: A
4. . What is the value of x if the ratios (2 + x)a:8b = 9a:12b are in direct proportion to each other?
Correct Answer: C
5. . A car can travel 120 km with 8L of gasoline. How many km can it travel at the same rate if it consumes 18 L of gasoline?
Correct Answer: A
6. . 30 tailors can sew 12 shirts in one hour. How many tailors are needed to sew 16 shirts during the same time?
Correct Answer: C
7. . 18 workers are needed to dig a hole in 12 hours. How many hours does it take to 6 workers to dig the same hole?
Correct Answer: D
8. .Using the graph shown below, calculate how many litres of gasoline does the given car consumes if it travels 840 km at the same rate.
Correct Answer: C
9. .The number of workers vs hours committed to do a job graph is shown below.
How long does it take to 25 workers to do this job?
Correct Answer: B
10. . The Earth revolves around the Sun at 30 km/s. It makes a complete revolution in one year. How long it would take to the Earth to complete a revolution around the Sun moving at the same speed if the Sun was 250 million km away from the Earth? The actual distance Earth-Sun is 150 million km and the period of revolution T (the time needed to compete one revolution) is calculated by the formula
T=2πR/vwhere R is the distance Earth-Sun, v is the speed of revolution and π is a constant (π ≈ 3.14).
Correct Answer: B
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