Question

Cyclist A starts down a road at a speed of 15
km/hour. Cyclist B starts 20 minutes later
from the same spot at a speed of 20
km/hour. B will overtake A after:
(A) 1 hour
(B) 1 1/2 hour
(C) 2 hours
(D) 2 1/2 hours​

Answer 1

Answer:

(A) 1 hour ( only ). To be exact.