Question

a car traveling 95 km/h is 110m behind a truck traveling 75km/h. How long will it take the car to reach the truck?

Answer 1

speed of car = 95 km/h

speed of truck = 75 km/h

relative speed of car with respect to truck = 95 - 75 = 20 km/h

now we will convert it into m/s

$v_r = 20 * \frac{1000}{3600} = 5.56 m/s$

now time to cross the truck will be given as

$time = \frac{distance}{speed}$

$time = \frac{110}{5.56}$

time = 19.8 s

so it will take 19.8 s to cross the truck