Roger buys six 1.5- litre bottles of fresh juice. he distributes 20
cl of juice to each of his pupils. calculate the number of pupils in his class if 600 ml is left.
Convert all to cl.
1500 - 20x = 60
Solve for x.
420
To find the number of pupils in Roger's class, we need to calculate how much juice was distributed to the pupils and then determine the number of pupils based on the remaining juice.
First, let's calculate how much juice was distributed to the pupils:
- Roger bought six 1.5-liter bottles of fresh juice, which means he had a total of 6 * 1.5 = 9 liters of juice.
- To convert liters to centiliters (cl), we multiply by 1000. So, Roger had a total of 9 * 1000 = 9000 cl of juice.
- Roger distributed 20 cl of juice to each pupil, so the total amount of juice distributed to the pupils is the number of pupils multiplied by 20 cl.
Next, we can calculate the remaining juice:
- If 600 ml (which is equal to 600 cl) of juice is left, this means the amount of juice distributed to the pupils is 9000 cl - 600 cl = 8400 cl.
Finally, we can find the number of pupils:
- To find the number of pupils, we divide the total amount of juice distributed (8400 cl) by the amount of juice distributed to each pupil (20 cl).
- So, the number of pupils in Roger's class is 8400 cl / 20 cl = 420 pupils.