Level 3
Tap A can fill up a tank in 2 hours. Tap B can fill up the same tank in 6 hours. How long will it take to fill up the tank if both taps are turned on at the same time? Express the answer(s) in h.
Level 3 PSLE
Mr Lee used two printers with different printing rates for a printing job. He started Machine A at 10 00 and started Machine B two minutes later.
He stopped both machines at 10 05.
The graphs show the total number of pages printed by each machine from the start of printing.
How many pages had been printed by Machine A at the time Mr Lee started Machine B?
What was the difference in the number of pages printed by the two machines from 10 00 to 10 05?
Which machine, A or B, has a faster printing rate? What is the difference in the number of pages printed by the machines in one minute? Give your answer in this format. (Eg A, 1)
Level 3 PSLE
Mr Lee used two printers with different printing rates for a printing job. He started Machine A at 10 00 and started Machine B two minutes later.
He stopped both machines at 10 05.
The graphs show the total number of pages printed by each machine from the start of printing.
How many pages had been printed by Machine A at the time Mr Lee started Machine B?
What was the difference in the number of pages printed by the two machines from 10 00 to 10 05?
Which machine, A or B, has a faster printing rate? What is the difference in the number of pages printed by the machines in one minute? Give your answer in this format. (Eg A, 1)
Level 3
A car uses 9 litres of petrol for every 50 km it travels at an average driving speed is 80 km/h. It uses 6 litres of petrol for every 70 km it travels when it average driving speed is 60 km/h. How much petrol will the car consume use for a journey which lasts 12 h if it travels at 80 km/h for 5 h and 60 km/h for the rest of the journey?
Level 3
A pool measuring 50 m x 25 m x 2 m was completely filled with water. The water was draining out of the tank at a constant rate and became completely empty after 25 minutes.
What fraction of the pool was filled with water at the end of 24 minutes? Express the answer in the simplest form.
How many litres of water was drained out of the pool at the end of 10 minutes?
Level 3
A rectangular container 100 cm by 50 cm by 45 cm was 20% filled with water. A tap was turned on to fill it up with water at a rate of 9 ℓ /min. Every 30 seconds after the tap was turned on, an iron ball of volume 500 cm3 was added to the container. How many iron balls of the same volume would there be in the container when the container is 100% filled with water?
