1 )Bill is a builder.On Monday he made mortar mix.He used 24kg of sand and 5kg of cement.On Tuesday Bill will make the same type of mortar mix.He will use 36kg of sand.How much cement does he need to make the same type of mortar mix?
On Monday, Bill needed for:
24 kg of sand 5kg of cement.
1kg of sand 5/24 of cement
36 kg of sand 36 x 5/24
(5 /24 ) x36= 5 x 3/2=15/2 =7.5kg of cement.