Question

A car travels a distance of 20m
in. 5 seconds and then another 12m
in 3 seconds. What is the average Speed of the car ?
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Answer 1

ANSWER: 4Km/h

EXPLANE: S=d/t

S=12/3

S=4km/h

Answer 2

Given :-

• A car travels a distance of 20m
• in 5 seconds and then another 12m
• in 3 seconds.

To find :-

• Average speed of the car

Solution :-

In first case

A car travels a distance of 20m in 5 seconds

• Distance (D1) = 20m
• Time (t1) = 5s

In second case

A car travels a distance of 12m in 3seconds

• Distance (D2) = 12m
• Time (t2) = 3s

Now,

As we know that

→ Average speed = Total distance travelled/total time taken

→ Average speed = D1 + D2/t1 + t2

→ Average speed = 20 + 12/5 + 3

→ Average speed = 32/8

→ Average speed = 4m/s

Hence,

• Average speed of car is 4 m/s