Sheet # 166
Name: _____________________ Date_____________
Show your work.
1) A dry concrete mix is made by mixing gravel, sand and cement in the ratio 5:4:1 by weight.
a) If 15 kg of sand is used, how much gravel would be needed?
b) If 80 kg of dry concrete mix is to be made up, find the weight of each ingredient.
c) If each 5 kg of dry concrete mix requires 1 liter of water, how much water would be needed to make 1 metric ton of concrete?
2) The school does assessment tasks in a ratio of projects to tests of 2:3.
a) If there were 6 tests last year, how many projects were there?
b) This year there are a total of 20 assessment tasks. How many of these would be tests?
Answers for sheet # 166
1)
a) 18.75 kg
b) Gravel = 40 kg, Sand = 32 kg, Cement = 8 kg
1 ton = 907 kg, 181.4 liters
c) 200 liters
2)
a) 4 projects
b) 12 tests