Question

A car travells at a speed of 90 in 2 1/2 hrs. How much time is required to reach 30 km.

Answer 1

Answer:

72 km

Step-by-step explanation:

v = s/t = 90000m/(2,5*3600)=10 m/s

s = v*t = 30000m= 10 m/s * t

t= 30000 m/(10 m/s) = 3000 s = 50 min

s(2 hr) = 10 m/s * 2 * 3600 s = 10 m/s * 7200 s = 72 000 m = 72 km