## Question

primary 6 | Maths | Measurement

Anyone can contribute an answer, even non-tutors.

##### Eleanor

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Date Posted: 5 months ago
Views: 41
J
5 months ago
Tip :

The equilateral triangle's sides are the same length as the square's sides.

So PST and QTR are isosceles triangles.
Eleanor
5 months ago
Thank you!
If you can, could you help with this question too?
Cookies are sold at 5 for 2 dollars
Lollipops are sold at 3 for 5 dollars
Mary paid \$408 for some cookies and lollipops. She packed them into bags such that each bag has 3 cookies and 2 lollipops. There was no cookies and lollipops left unpacked. How many bags of cookies and lollipops did Mary pack?
J
5 months ago
Info given:

① 1 bag has 3 cookies and 2 lollipops
③ 3 lollipops cost \$5

Trick is to multiply the number of bags such that the total cookies can be divided by 5 and total lollipops can be divided by 3.

1 bag has 3 cookies and 2 lollipops.2 lollipops cannot be divided by 3.

But if we multiply number of bags by 3,
3 bags : 9 cookies and 6 lollipops

Now 6 lollipops can be divided by 3, but 9 cookies cannot be divided by 5. But if we multiply by 5 now, it would be divisible by 5.

Multiply by 5,
15 bags : 45 cookies and 30 lollipops

So 45 cookies cost 9 x \$2 = \$18

30 lollipops ÷ 3 cookies per set = 10 sets
So 30 cookies cost 10 x \$5 = \$50

Total cost of 15 bags
= \$50 + \$18
= \$68

Now the total paid was \$408.

\$408 ÷ \$68 = 6

So there are 6 sets of 15 bags.

Which means that total number of bags packed
= 6 x 15
= 90
J
5 months ago
Done editing. Hope it helps and if you got any queries feel free to ask.