Question

Jessica left the mall and drove toward the desert at an average speed of 40 mph. Shreya left one hour later and drove in the same direction but with an average speed of 60 mph. How long did

Answer 1

Your question is incomplete but I will assume you want to find when she will overtake her

let the time taken by Jessica be t hrs

distance covered by 40t
distance covered by Shreya = 60(t-1)
but those distances are equal

60(t-1) = 40t
60t - 60 = 40t
20t = 60
t=3
state the conclusion