Question

calculate the speed of a persons car if it travels a distance of 3 kilometre from 10:20 a.m. to 10:40 a.m.​

Answer 1

Answer:

Speed of Person's car is 9 km/hr.

Explanation:

Given,

Car travels a distance of 3 kilometre from 10:20 a.m. to 10:40 a.m.

To find: calculate the speed of a car

Solution:

Time taken(t) = 10:40 - 10:20 am = 20 minute = 20 / 60 hour

Distance travelled(d) = 3 km

As we know, Speed is defined as distance travelled per unit time.

or, Speed = distance  / time

or, Speed = 3 / (20/60)

or, Speed = (3*60)/20

or, Speed = 9 km/hour

Therefore, Speed of Person's car is 9 km/hr.

Answer 2

Explanation:

Given

distance=3km=3000m

time=20minute=20×60= 1200sec

speed=3000/1200=2.5m/s