A car leaves town, A at the speed of 90 km/h. Three hours later leaves the same city another car in pursuit of the first with a speed of 120 km / h. How much time will take to reach it?

Select the appropriate response:

A) t = 6hrs

B) t = 12 hrs

C) t = 30 min

D) None of the answers are correct

Question

Mathematics

Davin

2 October, 17:03

A car leaves town, A at the speed of 90 km/h. Three hours later leaves the same city another car in pursuit of the first with a speed of 120 km / h. How much time will take to reach it?

Select the appropriate response:

A) t = 6hrs

B) t = 12 hrs

C) t = 30 min

D) None of the answers are correct

+1

Answers (1)

Know the Answer?

Mollie Cherry · Answer 1

D) None of the answers are correct

Step-by-step explanation:

Let t be the time since the first car leaves

Distance of first car:

90t

Distance of second car:

120 (t - 3)

90t = 120 (t - 3)

90t = 120t - 360

360 = 30t

t = 12

The second car takes 12-3 = 9 hours to reach it

A car leaves town, A at the speed of 90 km/h. Three hours later leaves the same city another car in pursuit of the first with a speed of 120 km / h. How much time will take to reach it?Select the appropriate response:A) t = 6hrsB) t = 12 hrsC) t = 30 minD) None of the answers are correct

A car leaves town, A at the speed of 90 km/h. Three hours later leaves the same city another car in pursuit of the first with a speed of 120 km / h. How much time will take to reach it?

Select the appropriate response:

A) t = 6hrs

B) t = 12 hrs

C) t = 30 min

D) None of the answers are correct