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primary 6 | Maths | Measurement
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(Mitsuki) Shoshanna loves BTS and anime
(Mitsuki) Shoshanna Loves BTS And Anime

primary 6 chevron_right Maths chevron_right Measurement chevron_right Singapore

Answer is 345

Date Posted: 1 month ago
Views: 18
J
J
1 month ago
90cm = 0.9m

Notice that 4 x 0.9m = 3.6m
And 3 x 1.2m = 3.6m

So this means that 4 short parts is the same as 3 longer parts.

Number of big balloons on 4 short parts
= 2 x 4 = 8

Number of small balloons on 3 longer parts
= 5 x 3 = 15

Difference in balloon number
= 15 - 8 = 7

When we compare 3.6m worth of each type of part, there are 7 more small balloons than big balloons.

We can pair every 3.6m of each type into a set.

So for there to be 105 more small than big balloons,

105 ÷ 7 = 15

There has to be 15 sets.

Now in each set, there were 15 small balloons for the shorter type and 8 big balloons for the longer type. That's a total of 23 balloons


Total number of balloons in 15 sets
= 15 x 23 = 345


The idea for this question is to find a common length for both parts first, then find how many sets of this common length make up the total.
(Mitsuki) Shoshanna loves BTS and anime
(Mitsuki) Shoshanna Loves BTS And Anime
1 month ago
Thank you! :)
J
J
1 month ago
Welcome

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Bern Ong @ 88Tuition
Bern Ong @ 88tuition's answer
97 answers (A Helpful Person)
1st
Working in Sets. Keep trying. You can do it;
(Mitsuki) Shoshanna loves BTS and anime
(Mitsuki) Shoshanna Loves BTS And Anime
1 month ago
Thank you! :)