There were 45 runners to start a race. in the first

Ответ:

unicornturd

11.03.2022

Step-by-step explanation:

Given: There were runners to start a race. In the first half of the race, $\frac{1}{3}$ of them dropped out. In the second half of the race, $\frac{2}{5}$ of the remaining runners dropped out.

To Find: How many runners finished the race.

Solution:

Total number of runners =45

Number of runners dropped out in first half of the race $=\frac{1}{3}\text{of total}$

$\frac{1}{3}\times45$

Number of runners remaining after first half $=\text{Total runners before first half}-\text{number of runners dropped out}$

45-15=30

Number of runners dropped out in second half $=\frac{2}{5}\text{of remaining after first half}$

$\frac{2}{5}\times30$

Number of runners who finished the race $=\text{runners remaining after first half}-\text{runners dropped in second half}$

30-12=18

Therefore runners finished the race.

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Ответ:

lexi8938

29.03.2021

Mathematics

14 km

Step-by-step explanation:

6 km in the afternoon

x km in the morning

6= x- 25%

6= 0.75x

x= 6/0.75

x= 8 km

total 6+8= 14 km

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There were 45 runners to start a race. in the first half of the race, 1/3 of them dropped out. in the second half of the race, 2/5 of the remaining runners dropped out. how many runners finished the race?

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