Question

A marathon runners run at a average speed of 14 km/hr how long it will take to complete a distance of 142 km

Answer 1

given,
total distance = 142 km
average speed = 14 km/hr
therefore time taken,
average speed = total distance / total time 
14 = 142 / t.time
14 t = 142
t.time = 142 / 14
t.time = 10.1 hr
therefore time taken = 10 hours...
     i hope that this will help u............................^_^

Answer 2

marathon runners run at a average speed of 14 km/hr
to cover 14km, they need = 1 hour
to cover 142 km, they need = 142/14 = 71/7 hour = 10.14 hour

∴ it will take 10.14 hours to complete a distance of 142 km