Register
In 1991, an American, Ann Trason, set a world record by running 1000 km in 7 hours, 50 minutes, and 9 seconds. Which is the best estimate of her average speed? (HINT: Think rate) A. 14 km per hr B. 12
29.2k views
4 votes
In 1991, an American, Ann Trason, set a world record by running 1000 km in 7 hours, 50 minutes, and 9 seconds. Which is the best estimate of her average speed? (HINT: Think rate)

A. 14 km per hr
B. 12 km per hr
C. 18 km per hr
D. 16 km per hr

User Miligraf
by
7.4k points

1 Answer

4 votes
We know, speed = distance / time
Here, distance = 1000 Km
t = 7 5/6 = 47/6 hours

S = 1000 * 6 / 47
S = 6000 / 47
S = 127.65 Km/h

[ Please check your distance would be 100 Km i guess, if yes, then your answer will be B) 12 Km/hr ]

Hope this helps!
User Berke Cagkan Toptas
by
8.2k points
← Prev Question Next Question →

Related questions

Ask a Question
Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.

9.5m questions

12.2m answers

Other Questions

How do you can you solve this problem 37 + y = 87; y =
How do you estimate of 4 5/8 X 1/3
A bathtub is being filled with water. After 3 minutes 4/5 of the tub is full. Assuming the rate is constant, how much longer will it take to fill the tub?
Write words to match the expression. 24- ( 6+3)
A dealer sells a certain type of chair and a table for $40. He also sells the same sort of table and a desk for $83 or a chair and a desk for $77. Find the price of a chair, table, and of a desk.
Link Copied!