Ratio and Rates

Write 12:36 in its simplest form

(a)  

Write 3:12:6 in its simplest form.

(a)  

There are 24 students in a year 9 maths class. 5 of the students are absent. The ratio of students absent from class to students present in class is:

(a)  

The ratio of petrol to oil in a lawnmower is 25:1. If Matthew has 4 litres of petrol, how much oil does he need to make the correct fuel mixture? Give your answer in mL.

(a)  

Jake mixes 28 buckets of sand with 7 buckets of cement. Write the ratio of cement to sand in its simplest form.

(a)  

Write 80 cents : $2 in its simplest form.

(a)  

Write 45 seconds : 2 minutes in its simplest form.

(a)  

Write 6kg : 4800g : 1.8kg in its simplest form.

(a)  

A developer plans to build a new high-rise in Brisbane. He has a model built as a scale of 1:1500. If the model is 17cm tall, what is the height of the proposed tower? Give your answer in metres.

(a)  

The local scouts are planning on building a new scout hall. The plan is 32cm long, 24cm wide and has a height of 9cm. The actual size of the hall is 16m long, 12m wide and 4.5m high. Determine the scale ratio in its simplest form.

(a)