Claire runs 10 km in 1 hour. How many kilometers does she run in half an hour? In #2 1/2# hours?
1 Answer
Feb 20, 2017
Explanation:
Since
#"half an hour is " 1/2" of an hour"# then she should complete half of the distance in this time.
#1"hour"to10"Km"#
#1/2"hour"to1/2xx10=5"Km"#
#2 1/2" hours can be expressed as"#
#2 1/2=1+1+1/2#
#"thus she should run " 10+10+5=25"Km"#
#"or"#
#1"hour"to10"Km"#
#2 1/2"hours"to2 1/2xx10=25"Km"#
#color(blue)"calculation for " 2 1/2xx10=5/cancel(2)^1xxcancel(10)^5/1=25"Km"#
