Question

Ten miles are a long distance to work[spot the error]​

Answer 1

Answer:

Let’s examine the sentence: “Fifty miles are a long distance to walk.” 'Fifty miles' denotes a unit. So, the sentence requires singular verb 'is' and not ‘are.’ Hence, Option A is the correct answer.

Answer 2

Answer:

Incorrect: Ten miles are a long distance to work.

correct: Ten miles is a long distance to work

Explanation:

It appears that the plural subject Ten miles is expressing a collective idea so a singular verb (is) should be used.