Bob left home, riding his bike at a rate of 10mph to go to the lake. cheryl, his wife, left 45 minutes ( 0.75 hours) later, driving her car at a rate of 25mph. how long will it take cheryl to catch up to bob?

It takes Cheryl 0.5 hour (or 30 minutes) to catch Bob.

Step-by-step explanation:

Bob:

rate = 10 mph

time = t

distance miles

Cheryl:

rate = 25 mph

time = t - 0.75 hours

distance miles

If Cheryl catchs up to Bob, then their distances are the same:

It takes Cheryl 1.25 - 0.75 = 0.5 hour (or 30 minutes) to catch Bob.

where are the options?

step-by-step explanation:

10

step-by-step explanation:

7+3=10