Questions

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76 P6.SP.TL.18012286

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?

4 m

Attempt

Rate of 1 object DST triangle Journey by parts Unit conversion Duration Volume Units method

77 P6.SP.JC.18011303

Level 3
Nick placed three empty containers side by side. The smallest container has a crack at the bottom of its side and the base area of each container is 18 cm². After he turned on the faucet for 68 minutes, the height of the water in the smallest container became 8 cm although 0.8 mℓ of water is leaking out of the crack per minute. Find the rate of flow of water from the faucet. Give the answer in mℓ/min.

4 m

Attempt

Rate more than 1 object Unit conversion Duration Volume

78 P6.SP.JC.21061106

Level 3 PSLE
The photocopying rates of two machines A and B are as shown. Both machines were use to make a copy of a set of notes which had been divided into teacher set and student set. Machine A took 7 minutes is to photocopy teacher set and Machine B took 9 minutes to photocopy student set.

How many pages were there altogether in the set of notes?
Another copy of the same set of notes was made using Machine B only. How many minutes did Machine B take?

4 m

Attempt

Rate more than 1 object Duration Unit conversion Number x value Units table

79 P6.SP.JC.18011323

Level 3
When both printers U and V are used, a collection of books can be printed in 3 hours. While printing, Printer U broke down. As a result, it took 1¹₃ hours to complete printing. If it would take Printer V 4 hours to print the collection alone,

how long would it take to print the collection of books using only Printer U? Express your answer in hours.
how long was Printer U used before it broke down? Express your answer in hours.

4 m

Attempt

Rate more than 1 object Unit conversion Duration Volume

80 P6.SP.TL.18012227

Level 3
If Albert and Marvin work together, they can complete a job in 14 days. If Albert and Marvin worked together for 7 days, followed by Marvin who worked alone for the next 21 days, they can finish off the job.