Rates and Ratio - Maths

 Problem 1:

One can of cat food will feed snowball the car for 3 days. How many cans are needed to feed snowball for:

1. 24 days?

2. 51 days?

Answers:

1. 24÷3=8

2. 51÷3=17

Problem 2 :

Timotes’s mp3 player is on repeat. It plays the song he loves 3 times in 12 minutes. How long would it take to play the song 9 times?

Answer:

36 times

Problem 3: 

Mrs Sharma’s car uses 11 litres of petrol for every 130 km. How much is needed to travel 390 km to visit the students at camp? 

Answer:

33 Litres

Problem 4:

Dane found this recipe for chilli con carne. He has 525g of mince.

Chilli con carne (2 people)

Ingredients

• 175 g Mince

• 1 bay leaf

• 50 g tomatoes 

• ½ an onion

• ½ tsp chilli powder 

• 120 g red kidney beans

1. How much of the ingredients will he need so that he can use all of the mince? 

2. How many people can he feed?

Answers:

1. Times every ingredient by 3:

Mince - 175g x 3 = 525g

Bay Leaf - 1 x 3 = 3

Tomatoes - 50g x 3 = 150g 

Onion - ½ x 3 = 1 ½ 

Chilli Powder - ½ tsp x 3 = 1 ½ tsp

Red Kidney Beans - 120g x 3 = 360g

2. 6 people - 2p x 3 = 6p