Sheet # 8
Name: _____________________ Date_____________
Use drawings, words, or numbers to explain how you got your answer.
1) We have 189 students and about 25 teachers, staff and parents in my school for most of the day. If each person uses two flushes a day, how many flushes will be there in a school year? If each flush uses 20 litres of water, how much water will be used in a school year? (1 school year = 180 days)
2) My school has 289 students and about 35 teachers, staff and parents for most of the day. If each person washes hands twice a day, how many hand washings will be there in a school year? If each hand washings uses 5 litres of water, how many liters of water will be used in a school year? (1 school year = 180 days)
Answers for sheet # 8
1) 214 people x 2 flushes/person x 180 school days = 77,040 flushes
1,540,800 liters
2) 324 people x 2 hand washes/person x 180 school days = 116,640 hand washes
116,640 x 5 liters/hand wash = 583,200 liters