Exercise 4 Solution Page 144 Math 5 Workbook

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Ngày cập nhật gần nhất: 15/4/2026

With a speed of 72km/h, to know how long it takes for a dolphin to swim 2400m, refer to the guidance for Exercise 4 on page 144 Math 5 Workbook.

Guidelines for Exercise 4 on page 144 Math 5 Workbook

Problem:
A dolphin can swim at a speed of 72km/h. How many minutes does it take for the dolphin to swim 2400m at that speed?

Solution Method:
- Convert the unit of measurement from km/h to m/h
- Calculate the time it takes for the dolphin to swim the distance of 2400 meters by dividing the distance by the dolphin's swimming speed.

Answer:
Conversion: 72km/h = 72000m/h
The dolphin swims 2400m in the time:
2400 : 72000 = 1/30 (hour) = 60 minutes × 1/30 = 2 (minutes)
Answer: 2 minutes.

Here's the guidance for Exercise 4 solution page 144 Math 5 Workbook focused practice. Additionally, this section includes 3 other exercises: Exercise 1 solution page 144 Math 5 Workbook, Exercise 2 solution page 144 Math 5 Workbook, and Exercise 3 solution page 144 Math 5 Workbook. Let's review the Math Grade 5 page 144 solutions to excel in Grade 5 Mathematics!

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