Question

A boy cycles a distance of 30km/h
a. Draw a table to show the time he takes if his speed is 10km/h and 20km/h
b. If he cycles at 18km/h, find the time he takes
c. Convert 100110 base two to a number in base three

Answer 1

Answer:

The total time for the journey is given as,

t=

v

1

d

1

+

v

2

d

2

=

40

30

+

20

30

=2.25hour

The average speed is given as,

v

avg

=

t

d

1

+d

2

=

2.25

30+30

=26.67km/h

Thus, the average speed of the car is 26.67km/h.