Talil is going to make some concrete mix.

He needs to mix cement, sand & gravel in the ratio 1:3:5 by weight.

Talil wants to make 180kg of concrete mix.

Talil has

15kg of cement

85kg of sand

100kg of gravel

Does talil have enough cement, sand and gravel to make concrete mix?

1. The problem says that the is ratio 1:3:5 by weight and Talil wants to make 180 kg of concrete mix.

2. Therefore, you have:

1+3+5=9

180 kg/9=20 kg

3. Each of the 9 parts of the ratio weights 20 kg. So, to make 180 kg of concrete mix, he needs:

1x20 kg=20 kg of cement

3x20 kg=60 kg of sand

5x20 kg=100 kg of gravel

4. Talil has:

15kg of cement (Not enough)

85kg of sand (More than enough)

100kg of gravel (Enough)

Does Talil have enough cement, sand and gravel to make concrete mix?

The answer is: No, she does no have enough cement, sand and gravel to make concrete mix.