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Question
primary 5 | Maths
| Rate & Ratio
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Date Posted: 3 years ago
Views: 304
45÷(25-20) = 9 min (Ans)
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Date Posted:
3 years ago
done
{{ upvoteCount }} Upvotes
clear
{{ downvoteCount * -1 }} Downvotes
Hope this helps
Date Posted:
3 years ago
Grouping difference question:
Every minute,
printer B prints 25 - 20 = 5 more photos than printer A.
In 2 minutes, printer B prints 5 × 2 = 10 more photos than printer A.
In 3 minutes, 5 × 3 = 15 more photos than printer A.
How many minutes are needed such that printer B prints 45 more photos than printer A?
45 ÷ 5 = 9
9 minutes are needed.
Every minute,
printer B prints 25 - 20 = 5 more photos than printer A.
In 2 minutes, printer B prints 5 × 2 = 10 more photos than printer A.
In 3 minutes, 5 × 3 = 15 more photos than printer A.
How many minutes are needed such that printer B prints 45 more photos than printer A?
45 ÷ 5 = 9
9 minutes are needed.
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