Question

Q10. The distance covered by an object is 420 km in 6 hours. The speed of the object is -
(A) 60 km/h (B) 40km/h
(C) 80 km/h
(D) 70 km/h​

Answer 1

Answer:

Speed = distance /time

So

420/6=70km/h is the answer

70km/h (D)

Explanation:

Answer 2

Given - Distance : 420 km

Time : 6 hours

Find - Speed of object

Solution - To find speed of object, we will use the relation between speed, distance and time. The three terms are related to each other as speed = distance/time.

As we need to find speed in kilometre/hour, there is no need to change the units of mentioned distance and time.

Now, keeping the values in formula to calculate speed.

Speed = 420/6

Speed = 70 kilometres/hour

Hence, speed of object is (D) 70 kilometres/hour.