It took a bus 20 minutes to travel a 25 km highway. What is the average speed of the bus in km/h?

Question

(another question)

A banca takes about 1 h to travel a distance of 15 km. A sailboat travels the same distance in 0.5 h. the same distance is traveled by a motorboat in 0.3 h.

i. Compute the average speed of each vessel.

ii. Which vessel is the fastest? Which is the slowest?

iii. Based on these data, how fast is the sailboat compared to the banca?

Answer 1

Bus travels 25 kms in 20 min.  

In 60 mins =   ??

=  {60 x 20} /  25  =  48 kms.  = 48 kms/60 min = 48kms/hr.

Answer 2

20min=1/3h

v=dx/dt=25km/1/3h=75km/h

Banca: v=15km/1h=15km/h

Sailboat: v=15km/0.5h=30km/h

Motorboat : v=15km/1/3h=45km/h

so fastest is motorboat and slowest is the banca

is 2 times faster

Answer 3

1. 20 min is 1/3 hour, so 25/1/3 = 75 km/hr

2. What is a banca?

i) 15 km/hr, 30 km/hr, 50 km/hr

ii) obvious

iii) badly worded. compared how?

difference is 15 km/hr

ratio is 1:2