Question

A cyclist is moving with a speed of 20km/h.How long will it take to travel a distance 1.5km?

Answer 1

Answer:

here

Explanation:

s=d/t

t=d/s

1.5/20

15/20×10

==3/40

Answer 2

Answer:

The cyclist will take 4.5 min or 270 s time to cover that distance.

Explanation:

• Distance: The length between two points is known as distance. Distance is indicated by 'S'. The SI unit of distance is meter (m).
• Time: Time indicates a moment at which any event occurs. Time is indicated by 't'. The SI unit of time is Second (s).
• Speed: Speed is the covered distance in unit second. Speed is indicated by 'v'. The SI unit of speed is m/s.

        Formula for speed = $\frac{covered distance}{time taken}$ i.e v = $\frac{s}{t}$.........(1)

         We can write, t = s/v ...............(2)

                         and s = v × t..............(3)

• Solution:  The speed and distance are given, we have to calculate time.  So we will use equation (2).

          v = 20 km/h     and     s = 1.5 km

      ∴Time (t) = s/v = 1.5/20 h = 0.075 h = 4.5 min = 270 s