1. the olympic record for the marathon is 2.00 h, 9.00 min., 21.0 s,. if the average speed of a runner acheiving this record is 5.436 m/s, what is the marathon distance?
a) 15,878 km
b) 7,761 km
c) 42.2 km
d) 26.2 km
2. a child is pushing a shopping cart at the speed of 1.5 m/s. how long will it take this child to push this cart down an aisle with a length of 9.3 m?
a)1.6 s
b)13.9 s
c)62 s
d)6.2 s