Two sprinters cover the same distance at speeds of 18 km/h and 20 km/h, respectively. Find the distance travelled when one takes 15 minutes longer than the other.
Show answer & explanation
Correct answer: B
Explanation
The correct answer is option 2 i.e. 45 km
Given that
Two sprinters cover the same distance at speeds of 18 km/h and 20 km/h, respectively
when one takes 15 minutes longer than the other.
Let the distance be x km
According to the question
⇒ (x/18) - (x/20) = 15/60
⇒ (10x - 9x)/180 = 15/60
⇒ x = 45
Hence, the distance traveled is 45 km