Math need help with answer !

11 Plus Maths – Preparation and Information

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Hope4chance
Posts: 30
Joined: Sat Jan 23, 2016 12:58 am

Math need help with answer !

Post by Hope4chance »

Need your help to find the answer for:
An aircraft travels 910 miles in 2hr 30 minutes, find the average speed

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doodles
Posts: 8300
Joined: Tue Oct 27, 2009 9:19 pm

Re: Math need help with answer !

Post by doodles »

Suggestion from here is:

2 1/2 hours = 5 lots of half an hour so

910 / 5 = 182 miles per half hour

182 X 2 = 364 miles per hour


Or

910/5 =182 x 2 = 364


( sorry don't have a division sign on my keyboard)
Hope4chance
Posts: 30
Joined: Sat Jan 23, 2016 12:58 am

Re: Math need help with answer !

Post by Hope4chance »

Thanks a lot dear doodles :)
Guest55
Posts: 16254
Joined: Mon Feb 12, 2007 2:21 pm

Re: Math need help with answer !

Post by Guest55 »

Average speed = total distance/total time = 910/2.5

Dividing by 2.5 is a bit tricky so you could double numerator and denominator = 1820/5 = 364 mph
Hope4chance
Posts: 30
Joined: Sat Jan 23, 2016 12:58 am

Re: Math need help with answer !

Post by Hope4chance »

Another good way! .. Thanks Guest55
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