Question

car moves with the speed of 60 km/h for 20 minutes and then with a speed of 75 km/h for 12 minutes find the total distance covered by the car

Answer 1

At first we will convert time which is in Minute to second,
=> Time (T1)20 min = 1200 s
=> Time (T2)12 min = 720 s

Now,
=> Speed (S1) 60 km/h = (60 x 5/18) m/s = 16.67 m/s
=> Speed (S2) 75 km/h = (75 x 5/18) m/s = 20.83 m/s

Now,

=> D1 = S1 x T1
=> D1 = (16.67 x 1200) m
=> D1 = 20004 m

Again,

=> D2 = S2 x T2
=> D2 = (20.83 x 720) m
=> D2 = 14997.6 m

Now,

Total Distance D = D1 + D2
=> D = (20004 + 14997.6) m
=> D = 35001.6 m
=> D = (35001.6/1000) Km
=> D = 35.0016 Km


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