Berikut ini adalah pertanyaan dari demixtwix pada mata pelajaran Matematika untuk jenjang Sekolah Dasar
for the journey, in hours and minutes.
(b) He took a slower train at 07 55 from B to A and reached A at 12 30. Find his average
speed.
Jawaban dan Penjelasan
Berikut ini adalah pilihan jawaban terbaik dari pertanyaan diatas.
Penjelasan dengan langkah-langkah:
(a) To find the time taken for Javier to travel from A to B at an average speed of 120 km/h, we can use the formula:
time = distance / speed
where distance is 450 km and speed is 120 km/h.
time = 450 km / 120 km/h
time = 3.75 hours
To convert this to minutes, we can multiply by 60:
time = 3.75 hours * 60 minutes/hour
time = 225 minutes
Therefore, the time taken for Javier to travel from A to B is 3 hours and 45 minutes.
(b) To find Javier's average speed on the slower train from B to A, we can use the formula:
speed = distance / time
where distance is 450 km (the same as before) and time is the difference between the departure time of the train (07:55) and the arrival time in A (12:30), which is:
time = 12:30 - 07:55
time = 4 hours and 35 minutes
To convert this to hours, we can divide by 60:
time = 4.58 hours
Now we can calculate the average speed:
speed = 450 km / 4.58 hours
speed = 98.25 km/h
Therefore, Javier's average speed on the slower train from B to A was 98.25 km/h.
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Last Update: Mon, 17 Jul 23