Sagot :
S= 22 min.
G= 7 min. more than S
H= 12 min. less than G
22 + 7 - 12 = 17 minutes
= 17 minutes that Helen ran
G= 7 min. more than S
H= 12 min. less than G
22 + 7 - 12 = 17 minutes
= 17 minutes that Helen ran