Question

9) Nivi covers 90 Km in 2 hours 30 minutes. Find the speed in meter per second?
10)Selvi covers 108 km in 3 hours. What is her speed in meter per second?

Answer 1

Answer:

9) We have distance = 90 km

Time = 2 (30/60) [1 hour = 60 min ]

time = 5/2 hours

We know speed = distance / time

speed = 90*2/5

speed = 36 km/h ‘

we want speed in m/s so , 36 * 1000 / 60 * 60

speed in m/s = 36,000 / 36,00 = 10 m/s

10) speed=108km/hr

=108(1000m/3600s)

=30s