Solving exercise 4 on page 143 of Math 5 textbook

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Solving exercise 4 on page 143 of Math 5 textbook is part of the Concentrated Practice, calculating the time for a fish to swim a distance of 10.5km.

Guidance for solving exercise 4 on page 143 of Math 5 textbook

Problem statement:
A fish can swim at a speed of 420m/minute. Calculate the time it takes for the fish to swim a distance of 10.5km.

Solution method:
- Convert the length unit from kilometers to meters
- Calculate the time for the fish to swim a distance of 10.5km by dividing the distance by the fish's swimming speed.

Answer:
Conversion: 10.5km = 10500m.
The time for the fish to swim 10.5km is:
10500 : 420 = 25 (minutes)
Final answer: 25 minutes.

Here's the solution guide for exercise 4 on page 143 of Math 5 textbook in the concentrated practice section. Additionally, there are 3 other exercises in this section: Solving exercise 1 on page 143 of Math 5 textbook, Practice, Solving exercise 2 on page 143 of Math 5 textbook, Practice, and Solving exercise 3 on page 143 of Math 5 textbook, Practice. Let's check out the solution for Math class 5 page 143, Practice to excel in Math class 5.

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