72 books weight 9 kilograms ?(¡) find the weigh of 80 books.(¡¡) how manybooks would weight 6 kgs?
Answers
Answered by
2
Answer:
(i) 80kgs
(ii) 48 books
Step-by-step explanation:
9 kilograms = 72 books
1 Kg = 8 books
(¡) find the weigh of 80 books.
80 books wt. = 80 * 1 kg = 80 kgs
¡¡) how manybooks would weight 6 kgs
1 kg = 8 books
6 kgs = 6*8 = 48 books
Answered by
2
Answer:
(i) 10 kg, (ii) 48 books.
Step-by-step explanation:
Given :
Weight of 72 books 9 kg
To find :
(i) Weight of 80 books
(ii) Number of books whose weight = 6 kg
Solution :
(i) More the books, more will be weight.
Therefore, it's a direct variation.
So, 72 : 9 = 80 : x
Since, Product of means = Product of extremes
=> 9 × 80 = 72 × x
=> x = (9 × 80)/72
=> x = 10
Hence, the weight of 80 books = 10 kg.
(ii) 72 : 9 = x : 6
=> 9x = 72 × 6
=> x = (72 × 6)/9
=> x = 48.
Hence, the number of books = 48.
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