If it took Mike 3 hours to ride 162 kilometres?

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lenagmat: Senior | Next Rank: 100 Posts; Posts: 45; Joined: Sun Oct 16, 2011 2:21 pm; Followed by:1 members

by lenagmat » Fri Oct 28, 2011 9:49 am

If it took Mike 3 hours to ride 162 kilometres, what was his average speed, metres per second?

1. 1.5
2. 5
3. 5.4
4. 15
5. 54

E.

Source: Beat The GMAT — Problem Solving | Fri Oct 28, 2011 9:49 am

GmatKiss: Legendary Member; Posts: 2789; Joined: Tue Jul 26, 2011 12:19 am; Location: Chennai, India; Thanked: 206 times; Followed by:43 members; GMAT Score:640

by GmatKiss » Fri Oct 28, 2011 9:57 am

IMO: E

1620000/(3*60*60) ~ 52

shankar.ashwin: Legendary Member; Posts: 966; Joined: Sat Jan 02, 2010 8:06 am; Thanked: 230 times; Followed by:21 members

by shankar.ashwin » Fri Oct 28, 2011 10:01 am

1km = 1000 m

162 kms = 162000 m

3Hrs = 3*60*60 = 10800 sec

Therefore metres/sec = 162000/10800 = 15m/sec

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