Miles & Kilometres

Question 1

A science exhibit explains that one mile is roughly 1.6 kilometres. Which statement correctly shows why this is true using the fact that 5 miles are about 8 kilometres?

Accepted Answer

Because 5 miles ≈ 8 km, dividing 8 km by 5 gives 1 mile ≈ 8/5 km = 1.6 km.

Answer

Because 5 miles ≈ 8 km, dividing 5 miles by 8 gives 1 mile ≈ 5/8 km ≈ 0.62 km.

Answer

Because 5 miles ≈ 8 km, adding the numbers gives 13, so 1 mile ≈ 13 km.

Answer

Because 5 miles ≈ 8 km, the relationship means 1 kilometre is about 1.6 miles, so the factor is 1.6 km per mile.

Question 2

Sam is deciding between two charity events. One is a 9‑kilometre walk, and the other is a 5‑mile bike ride. Using the approximation that 5 miles is about 8 kilometres, which event covers the greater distance, and by roughly how many kilometres?

Accepted Answer

The walk is longer by about 1 kilometre.

Answer

The bike ride is longer by about 1 kilometre.

Answer

The walk is longer by about 2 kilometres.

Answer

The walk is longer by about 4 kilometres.

Question 3

A school is planning a fun run. One route is 10 kilometres long and another route is 6 miles long. Using the approximation 5 miles ≈ 8 km, which route is longer and by roughly how much?

Accepted Answer

The 10‑km route is longer by about 0.4 km.

Answer

The 6‑mile route is longer by about 0.4 km.

Answer

Both routes are about the same length.

Answer

The 6‑mile route is longer by about 2 km.

Try three questions

A science exhibit explains that one mile is roughly 1.6 kilometres. Which statement correctly shows why this is true using the fact that 5 miles are about 8 kilometres?

Sam is deciding between two charity events. One is a 9‑kilometre walk, and the other is a 5‑mile bike ride. Using the approximation that 5 miles is about 8 kilometres, which event covers the greater distance, and by roughly how many kilometres?

A school is planning a fun run. One route is 10 kilometres long and another route is 6 miles long. Using the approximation 5 miles ≈ 8 km, which route is longer and by roughly how much?

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