The answer: Time= Distance divide Speed.
Speed= 675,000 divide 900= 750 minutes. Convert that to hours and that leaves you with 12 hours and a half. If these questions are bothering you, just revise them- they’re speed distance time equations and i’d be blessed if they come up in my maths exam tomorrow.
I positive 15 and negative 15, in effect the absolute value function just removed negative signs

the decimals are commas and the double decimal is a real decimal