Question

a train is moving at a uniform speed of 80 km /hr how for it will travel in 15 minutes

Answer 1

80km/hr =80x5/18 m/sec
total distance travelled in 15 mins =15x60 sec speed x time= 80x5/18x15x60 =20,000m

Answer 2

speed = 80 km/hr

time = 15 minutes = 50 /60 = 0.25 h

so , speed = distance / time
distance = speed × time
distance = 80 × 0.25 = 20 km