Question

7th-grade kids went for a walk. In the morning, they walked 3 hours, but later 1 hour. How many kilometers did the kids walk in the morning if later their speed was lowering to 2 km/h? What speed was in the morning? The kids walked a total of 12 km.

a) They walked 6 km in the morning, and their morning speed was 3 km/h.
b) They walked 4 km in the morning, and their morning speed was 4 km/h.
c) They walked 3 km in the morning, and their morning speed was 3 km/h.
d) They walked 5 km in the morning, and their morning speed was 2 km/h.

Answer 1

The kids walked 3 km in the morning and their morning speed was 3 km/h.

Step-by-step explanation:

To calculate the distance the kids walked in the morning, we can use the formula distance = speed × time. Let's assume the morning speed is x km/h. In the morning, they walked for 3 hours, so the distance would be 3x km. They later walked for 1 hour at a speed of 2 km/h, so the distance would be 2 km. From the given total distance of 12 km, we can set up the following equation: 3x + 2 = 12. Solving the equation, we find that x = 3.

Therefore, the kids walked 3 km in the morning and their morning speed was 3 km/h.