Question

a train moves at a constant speed of 75 km /hr (1)how far it will travel in 20 minutes (2)find the time required to cover distance of 250 km

Answer 1

1)SPEED (S) = 75KM/Hr = 75 * 1000/60mi=1250 m/mi

time (t) = 20mi

distance (d) = s*t = 1250 m/mi * 20 mi =25000m

2) s= 75km/hr
d= 250km

time (t) = d/s = 250km/75km/hr

= 10/3 hr

Answer 2

(1)
speed= 75 km/hr
time = 20min
= 20/60 hr
= 1/3 hr
Distance = ?

Distance= Speed × Time
= 75 × 1/3
= 25 km

(2)
Speed= 75km/hr
Distance = 250 km
Time = ?

Time = Distance/Speed
= 250/75
= 50/15
= 10/3 hr
= 10/3 × 60 min
= 200 min
= 3 hr and 20 min


Hope it helped....
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