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Degger [83]
3 years ago
6

Joseph and his family were going to the beach. Joseph's sister was running late so Joseph left their house with his mom. Joseph'

s dad waited for Joseph's sister to get ready and left one hour later driving 75 km/hour in an effort to catch up to Joseph and Joseph's mom. After driving for four hours Joseph's dad finally caught up. How fast was Joseph's mom driving?
Mathematics
1 answer:
Drupady [299]3 years ago
6 0

Answer:

60 km/hr.

Step-by-step explanation:

When Dad caught up the the time he had been  driving was 4 hours and the time Mom had been driving was 1 + 4 = 5 hours.

They both drove the same distance, d km.

For Dad:

speed = d / time

75 = d / 4

d = 75 * 4 = 300 km.

Mom took 5 hours to travel this distance, so

Mom's speed was 300 / 5 = 60 km/hr.

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