Question

solve these questions :
a) A car travelling at the speed of 45 km per hour takes 20 minutes to reach its density and what distance has the car travelled?
b) the distance between two stations is 240 km. are train tracks 4 hour to cover this distance calculate the speed of the train and metre per second .
c) a train is running at the speed of 60 km per hour calculate the speed of train in metre per second .
d) the speed of a racing car is 60 metre per second what will this speed in kilometre per hour .​

Answer 1

Answer:

Step-by-step explanation:

a)

speed = 45 km/hr = 45/60=0.75 km /min

0.75*20 minututes = 15 km

so, the distance travelled in 20 minutes = 15 km,

b)

speed = distance / time = 240/ 4 = 60 km/hr

c)

speed in metres /sec = 60000/3600 = 16.666 metres /sec

d)

speed of a racing car = 60 metres/second

3600 secs = 1 hr

60*3600 = 216000 metres/hr

1km = 1000 metres

216000/1000 = 216 kms/hr