Question

Deepa covers a distance of 27km in 90 min. What is her speed in km/h & m/s

Answer 1

Answer:

distance is equal to 27 km =27000 m

time is equal to 90 min = 5400 sec

Explanation:

speed is equal to distance / time = 27000/5400

= 270/54

Answer 2

To find :

speed of Deepa in :

i) km/h

ii) m/s

Given :

distance travelled = 27 km

time taken = 90 min

Formula for calculations:

• speed = distance/time
• km/h = 18/5 × m/s
• m/s = 5/18 × km/h

Solution:

convert the minutes into hours

90 min = 1.5 hours

so, speed of deepa :

i] speed = distance/ time

= 27km/1.5 h

= 18 km/h

ii] m/s = 5/18 × km/h

so, speed of deepa in m/s

= 5/18 × 18

= 5 m/s