Teacher Name:Ambreen Badar Class:7 Subject:Mathematics Date:27th January 2017
Topic:Ratio, Rate and Proportion
Q1: A school has 20 teachers and 480 students. What is the ratio between teachers to
students?
Q2: In a batch of 10 dozen eggs, 25 are cracked. What is the ratio of cracked eggs to
un-cracked eggs?
Q3: A combine harvester produces 9 tonnes of grain in 6 hours. How many tonnes does
it produce in 54 hours?
Q4: A machine puts tar on a road at the rate of 4 meters in 5 minutes.
a)How long does it take to cover 1km of road?
b)How many meters of road does it cover in 8 hours?
Q5: Ahmed works in a bank and earn $2000 a month. Sara is a teacher and earns $1500 a
month. What is the ratio of Sara’s salary to Ahmed’s salary?
Q6: A car uses 20 litres of petrol to travel 160 km. How much petrol does the car use to travel
400 km?
Q7: Write either ‘Yes’ or ‘No’ to indicate whether each of the following pairs of ratios are
Equivalent.
a)7 : 11 and 42 : 66 ______
b)5 : 9 and 35 : 28 ______
c)14 : 15 and 30 : 28 ______
d)19 : 27 and 76 : 108 ______
e)85 : 15 and 3: 7 ______
Q8: A necklace has green, yellow and blue beads in the ratio 2: 3: 5. There are 24 green beads
on the necklace. How many yellow and blue are there?
Q9: The ratio of girls to boys in a class is 6:5. There are 18 girls. How many boys are there?
Q10: Sand and gravel are mixed in the ratio 4 : 3 to make ballast. 80 kg of the sand is used. How
much gravel is used?
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