Question

a covers 3 kilometre in 10 minutes will be covers 10 km in 15 minutes the average speed is greater for
a) a
b) b
c) same for both option
d )none of this​

Answer 1

Answer:

av.speed for B=10/4=5/2=2.5

av.speed for a=3/6=1/2=0.5

Explanation:

average speed of a is less

Answer 2

Answer: The average speed is greater for b i.e.option (b).

Explanation:

The average speed is calculated as,

$v=\frac{x}{t}$      (1)

Where,

v=average speed

x=distance traveled

t=time taken to cover the required distance

Case A:

The distance traveled by a=3 km=3000m

The total time is taken to cover the required distance=10 minutes=60seconds

We get the following by inserting the variables in equation (1):

$v_1=\frac{3000}{600}$

$v_1=5m/s$     (2)

Case B:

The distance traveled by b=10 km=10,000m

The total time is taken to cover the required distance=15 minutes=90seconds

We get the following by inserting the variables in equation (1):

$v_2=\frac{10000}{900}$

$v_2=11.11m/s$    (3)

Hence, the average speed is greater for b i.e.option (b).

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