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Ghella [55]
3 years ago
7

A car travel 3 hours. In first hour it travelled 30 kilometre, 45000 m in second hour and 7500000 cm in third hour. Find average

speed in kilometre per hour ​
Mathematics
1 answer:
mihalych1998 [28]3 years ago
3 0

45000 \: m \times  \frac{1 \: km}{1000 \: m}

45 km in the 2nd hour

7500000 \: cm \times  \frac{1 \: m}{100 \: cm}  \times  \frac{1 \: km}{1000 \: m }

75 km in the 3rd hour

\frac{(75 - 30)}{(3 - 1)}

22.5 km/h

//

I tried.

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Answer:

<em>The percent error of the cyclist's estimate is 5.63%</em>

Step-by-step explanation:

<u>Percentages</u>

The cyclist estimates he will bike 80 miles this week, but he really bikes 75.5 miles.

The error of his estimate in miles can be calculated as the difference between his estimate and the real outcome:

Error = 80 miles - 75.5 miles = 4.5 miles

To calculate the error as a percent, we divide that quantity by the original estimate and multiply by 100%:

Error% = 4.5 / 80 * 100 = 5.625%

Rounding to the nearest hundredth:

The percent error of the cyclist's estimate is 5.63%

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