Question

kelly runs from 4:50pm until 5:20 pm at an average speed of 7km/h. How far did she go?

Answer 1

Answer:

time, t= 30mins = 1800s

speed,u = 7km/h = 7*5/18 m/s

distance = speed* time

             = 35/18 * 1800

            = 3500m = 3.5km

Mark me the brainliest if helped

Explanation:

Answer 2

Given: the time taken by Kelly from 4:50 pm to 5:20 pm, t = 30 minutes

           the speed of Kelly, v = 7 km/hr

To Find: the distance covered by Kelly, d.

Solution:

To calculate d, the formula used:

• distance = speed x time
• d  = s x t

First, convert 30 minutes into hours:

1 hr = 60 min

60min = 1hr

1 min   = (1 / 60)hr

so, 30 min = ( 1/ 60) x 30

                 = 30 / 60

                 = 3/ 6

                 = 1 / 2

30 min      = 1 /2 hr

Applying the formula for d:

d = 7 x ( 1 / 2)

  = 7 x 1 / 2

  = 7 / 2

  = 3.5

d = 3.5 km

Hence, the distance covered by Kelly is 3.5 kilometers.