Question

plz help in question no 6,8,9,10

Answer 1

Answer:

Step-by-step explanation:

6). Average speed=12km/hr

Time =2hr 45 mins

=2+45/60

=2+3/4

=11/4hr

Therefore distance

travelled=speed×time

=12×11/4

=3×11

=33km

8). Convert km into meters

1 km = 1000 m

= 45000meters

Convert hours into second

1 hour = 3600 seconds

=> 45000/3600

=> 50/4 m/s

Distance = speed*time

=> 50/4*6

= 75meters

9). Convert km into meters

1 km = 1000 m

= 48000meters

Convert hours into second

1 hour = 3600 seconds

=> 48000/3600

=> 40/3 m/s

Time = distance/speed

=> 80/40*3

=> 2*3

=> 6 seconds

10). Convert km into meters

1 km = 1000 m

11km = 11000 m

1 minute = 60s

12minutes =12×60=720s

Speed =distance/time

=> 11000/720

=> 15.27m/s