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Maths qusetions!! (Hard)
Please Work these following questions out
I am stuck=(
Show your working please=]
1) A large tub of popcorn costs ￡3.80 and holds 280g.
A regular tub of popcorns costs ￡3.50 and holds 175g.
Rob says that 200g Large tub is the better value for money.
Linda says that 175g Regular tub is the better value for money.
-Who is correct?
-Explain the reasons for your answer.You must show all your working.
2) This item appeared in a newspaper
Cows produce 3% more milk
A farmer found that when his cow listened to classical music the milk it produced increased by 3%.
This increase of 3% represented 0.72 Litres if milk
-Calculate the amount of milk produced by the cow when it litened to classical music.
3) PQR is a right-angled triangle.
-Work out the length og PQ
-Give your answer in 3 significant figyres.
Thanks very much=D
- bean_bottom_2Lv 51 十年前最愛解答
280g for ￡3.8 so each gram is ￡0.01357
175g for ￡3.5 so each gram is ￡0.02
Therefore the large tub is cheaper (ie 175g for ￡3.5 is more expensive).
0.72L is 3% so that total before the increase is 100% = 24L
After the increase, the total will be 24.72L
I am assuming angle PQR is the right angle (from your notation). This implies 62 = 42 + (PQ)2
==> 36 = 16 + (PQ)2
==> 20 = (PQ)2
==> PQ = 4.472