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11 Year Old Maths Homework Question

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bobthebandit | 21:59 Tue 30th Apr 2013 | Quizzes & Puzzles
8 Answers
In a wood are there are 300 trees. The ratio of oak to ash trees is 2:13. How many ash trees are there in the wood?
All replies gratefully received.
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Avatar Image elliemay1
260
22:01 Tue 30th Apr 2013
Avatar Image Dinkypuzzled
Divide 300 by 15.
multiply by 13
22:01 Tue 30th Apr 2013
Avatar Image bibblebub
as fractions, 2/15 are oaks and 13/15 are ash

so number of ash trees = 300 * 13/15 = 260
22:01 Tue 30th Apr 2013
Avatar Image ubasses
260
22:01 Tue 30th Apr 2013
Avatar Image sherrardk
The way I would do it - for every 15 trees, 2 are oak and 13 are ash. How many 15's in 300? 20 - so there are 20 x 2 oak trees (40) and 20 x 13 ash trees (260).
22:03 Tue 30th Apr 2013
Avatar Image elliemay1
2+13=15
Divide 300 by 15=20.
2x20=40oak
13x20=260ash.
22:03 Tue 30th Apr 2013
Avatar Image bobthebandit
Question Author
Many thanks for your answers!
22:22 Tue 30th Apr 2013
Avatar Image Sparkles62
260
13 of every 15 are ash, 260 in 300
22:27 Tue 30th Apr 2013

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