Dori left her house at 12: 00 pm and walked at 50 steps per minute and malory left her house at 12: 20 and walked 90 steps per minute what time did malory catch up to dori?

Malory will catch up with Dori in 25 minutes.

Step-by-step explanation:

Given:-

Dori walking at 50 steps/min.

Malory walking at 90 steps/min.

Now, as Dori left the house 20 mins  ahead of Malory and

Dori is walking at speed of 50 steps/min, that means

Dori is walking ahead of Malory by 50 (steps) 20 (minutes)

Dori is walking ahead of Malory by 50 20

Dori is walking ahead of Malory by = 1000 steps

Now, let time be t of walking by Dori and Malory,

to calculate the time for Malory to catch up with Dori can be written as,

where, 1000 is the headstart for Dori, 50 and 90 is the walking speed of Dori and Malory respectively in steps/ min.

Therefore Malory will catch up with Dori in 25 minutes.

step-by-step explanation:

9 sandwiches per hour

step-by-step explanation:

when we have a rate, we want a 1 in the denominator

27/3 = 9

27 sandwiches/ 3 hours = 9 sandwiches/hour