Lesson 3 (h1n1 Remediation)

Name: __________________________( ) Marks: _______________ Class: Secondary 2 ( ) Date: ________________ Revision Topic: Proportion & Rate 1

It takes 6 students 10 days to complete a project. How many days would 15 students take to complete a similar project? Assume that they work at the same rate.

2

It takes 15 men 120 days to build a house. If the owner wants the house to be built in 40 days, how many more men will be needed?

3

A van uses 9 litres of petrol to travel 108 km. Calculate (a) the distance the van can travel with 4 litres of petrol, (b) the amount of petrol needed to travel 200 km.

4

A motorist travelled from Singapore to Malacca via Johor Bahru. He takes half an hour to travel from Singapore to Johor Bahru, a distance of 25 km. At Johor Bahru, he stopped for a 20-minute break. He continued his journey to Malacca, covering a distance of 190 km in 3 hours. Calculate (a) the total time taken for the journey, (b) the total distance travelled, (c) the average speed for the whole journey.

1

5

The table below shows the charges for ordering copies of a book. A bookseller ordered 100 copies of the book. If he had to pay a fixed delivery fee of $3.00, how much money did he have to pay altogether for the books? First 20 copies $5.90 per copy Next 50 copies $5.50 per copy Subsequent copies $4.90 per copy

6

The table shows the monthly rates of subscription to an internet service for Normal Dial-up. Plans X: Surf ‘N Save Y: Easy Access Z: Quick Access (a) (b)

Normal Dial-up $2.95 for the first 2 hours $2.95 for each subsequent hour or part thereof $9.95 for the first 13 hours $2.95 for each subsequent hour or part thereof $24.95 for the first 32 hours $ 2.95 for each subsequent hour or part thereof

Ben plans to use the service for 25 hours a month. Which plan would be the best for him? Carol used the service for 5 hours and 35 minutes last month. Calculate how much more she would have to pay under plan X than plan Y.

2