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Exercises 1, 2, 3, and 4 in the exercise book of exercise 131 Math 5 volume 2 are all guided to solve in the document Solving Math for grade 5 page 62, 63 VBT volume 2, Practice, exercise 131. Students and parents can refer to this document to easily solve speed-related exercises.
Solve math problems for grade 5 page 62, 63 VBT volume 2, Practice, exercise 131
Solve exercise 1 - Math exercise book for grade 5 volume 2 page 62
Problem:
A car is passing over a bridge with a speed of 21.6 km/h. Calculate the speed of the car in units of measurement.
a. m/minute ;
b. m/second.
Solution Method
- Convert the measurement to the appropriate unit.
- To calculate speed, divide the distance by the time taken.
Answer
a) Convert: 21.6km = 21600m ; 1 hour = 60 minutes.
The speed of the car in meters per minute is:
21600 : 60 = 360 (m/min)
b) Convert: 21.6km = 21600m ; 1 hour = 3600 seconds.
The speed of the car in meters per second is:
21600 : 3600 = 6 (m/s)
Answer: a) 360m/min ; b) 6m/s.
2. Solve problem 2 - Math workbook grade 5 volume 2 page 62
Problem:
Fill in the blank (as shown):
Solution Method
- Convert the time measurement to decimal form with hours as the unit.
- To calculate speed, divide the distance by the time taken.
v = s : t
Answer
+) The first blank:
The speed to find is :
v = s : t = 63 : 1.5 = 42 km/hour
+) The second blank:
Convert: 3 hours 30 minutes = 3.5 hours
The speed to find is :
v = 14.7 : 3.5 = 4.2 km/hour
+) The third blank:
Convert: 1 hour 15 minutes = 1.25 hours
The speed to find is :
v = 1025 : 1.25 = 820 km/hour
+) The fourth blank:
Convert: 3 hours 15 minutes = 3.25 hours
The speed to find is:
v = 79.95 : 3.25 = 24.6 km/hour
We have the result table as follows:
3. Solve problem 3 - Math exercise book for grade 5 volume 2 page 62
The running speed of the athlete is:
1500 : 240 = 6.25 (m/s)
Answer: 6.25 m/s.
Convert: 4 minutes = 240 seconds.
To calculate the running speed of the athlete, we divide the distance by the time taken to run that distance.
Answer: 6.25 m/s.
Convert: 4 minutes = 240 seconds.
The running speed of the athlete is :
1500 : 240 = 6.25 (m/s)
Answer: 6.25 m/s.
4. Solve problem 4 - Math workbook grade 5 volume 2 page 63
Problem:
The distance between city A and B is 160km. A car leaves A at 6:30 and arrives at B at 11:15. Calculate the speed of the car, knowing that the car stops for 45 minutes along the way.
Solution method
- Convert time to seconds.
- To calculate speed, divide the distance by the time taken.
v = s : t
Answer
Including the break time, the car takes:
11 hours 15 minutes - 6 hours 30 minutes = 4 hours 45 minutes
Without considering the break time, the car takes:
4 hours 45 minutes - 45 minutes = 4 hours
The speed of the car is:
160 : 4 = 40 (km/hour)
Answer: 40 km/hour.
You are viewing the instructions for solving Grade 5 math on pages 62 and 63 of VBT Exercise Book 2, Practice with some exercises 131. You can review the instructions for solving Grade 5 math on pages 60 and 61 of VBT Exercise Book 2 Speed or preview the instructions for solving Grade 5 math on pages 63 and 64 of VBT Exercise Book 2 Distance to understand more about the lesson.
Wishing you all success in math.
