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3. section b rates and ratios1andnbspandnbspandnbspandnbspandnbspandnbspandnbspandnbspandnbsp fully simplify the following ratiosaandnbspandnbspandnbspandnbspandnbsp...

# Question: section b rates and ratios1andnbspandnbspandnbspandnbspandnbspandnbspandnbspandnbspandnbsp fully simplify the following ratiosaandnbspandnbspandnbspandnbspandnbsp...

###### Question details

Section B: Rates and Ratios

1          Fully simplify the following ratios:

a)      24:40

b)      4 minutes: 2 hours

2          The ratio of a boy’s weight to that of his father is 3:8. If the boy weighs 28.8 kg, how much does his father weigh?

3          A weed spray is made of wetting agent and herbicide in the ratio 97:3 respectively.  To make 20L of weed spray, how much herbicide would be needed?

4          Mandy purchased 42L of petrol for $66.36. What was the cost per litre? 5 If a car uses 12L of fuel to travel 100 km, how much will it use to travel 375 km? 6 A tap is dripping at a rate of 32 drops per minute. If each drop contains 1.4 mL of water, calculate the number of litres dripping from the tap in a day. 7 Which of the following packet sizes of coffee is the best buy? a) Small: 150 g for$5.18

b)               Large: 1 kg for \$45

8    Mark cycled at a speed of 24 km/h for 40 minutes. How far did he travel?

9          A tennis ball is served and travels 18 m in 0.54 seconds before hitting the ground.

At what speed in km/h was the ball served?