A school has 60 teachers. The table shows information about the distances, in km, the teachers travel to school
each day.
Distance (d km)
Frequency
12
6
0 5 10 15 < d < 20
4
6
20 14
25 < d < 30
18
Work out an estimate for the total distance travelled to school by the 60 teachers
each day.
(3 marks)
km

He ! a group of farmers planned to clean 80 acres of wheat per day to finish the work on schedule. right before the work started, they received a new piece of machinery that them clean 10 more acres per day than originally planned. as a result of increased productivity in the last day before the deadline they only had to clean 30 acres. how many acres of wheat did the group of farmers have to clean?