Question

An object is traveling at a steady speed of 10 1/5 km/h. How long will it take the object to travel 1 4/5 km? First, round to the nearest integer to find the estimated answer. Then find the exact answer.

It takes the object about _ minute(s) to travel 1 4/5 km.

a) 9 minutes
b) 10 minutes
c) 8 minutes
d) 7 minutes

Answer 1

To find the time taken to travel a specific distance, we can round the speed to the nearest whole number and use the formula time = distance / speed. In this case, it takes the object about 9 minutes to travel 1 4/5 km.

Step-by-step explanation:

To find the estimated answer, we can round the speed to the nearest whole number. 10 1/5 km/h is approximately 10 km/h.

Next, we can use the formula distance = speed x time to find the exact answer. Rearranging the formula, we have time = distance / speed. Plugging in the values, time = 1 4/5 km / 10 1/5 km/h.

Simplifying the fractions, we get time = 9 minutes. Therefore, it takes the object about 9 minutes to travel 1 4/5 km.