Ask Singapore Homework?
Upload a photo of a Singapore homework and someone will email you the solution for free.
Question
primary 6 | Maths
2 Answers Below
Anyone can contribute an answer, even non-tutors.
i got answer 5:3. The answer sheet says 5:2
Date Posted: 1 year ago
Views: 250
See 2 Answers
done
{{ upvoteCount }} Upvotes
clear
{{ downvoteCount * -1 }} Downvotes
Using trial and error and confirmation method:
every 7 tables there are 25 chairs.
If each 3 tables has 5 chairs, then 4 tables has 3 chairs, then
3*5 + 4*3 = 27 not equal to 25
similarly, try
2*5chairs + 5*3chairs = 25 chairs
You get 2 : 5
Using the calculation method:
'a' tables has 3 chairs
'b' tables has 5 chairs
total no of chairs = 3a + 5b
total no of tables = a + b
a + b = 7
3a + 3b = 21
3a + 5b= 25
2b = 4
b = 2
a = 7-2 = 5
total no of chairs = 3chairs*(5 tables) + 5chairs*(2 tables)
therefore ratio of tables is 2 : 5
every 7 tables there are 25 chairs.
If each 3 tables has 5 chairs, then 4 tables has 3 chairs, then
3*5 + 4*3 = 27 not equal to 25
similarly, try
2*5chairs + 5*3chairs = 25 chairs
You get 2 : 5
Using the calculation method:
'a' tables has 3 chairs
'b' tables has 5 chairs
total no of chairs = 3a + 5b
total no of tables = a + b
a + b = 7
3a + 3b = 21
3a + 5b= 25
2b = 4
b = 2
a = 7-2 = 5
total no of chairs = 3chairs*(5 tables) + 5chairs*(2 tables)
therefore ratio of tables is 2 : 5
Date Posted:
1 year ago
done
{{ upvoteCount }} Upvotes
clear
{{ downvoteCount * -1 }} Downvotes
Answer is 2:5
Date Posted:
1 year ago
360 Tutoring Program