Question

The weight of 45 books of 9kg.

(I) What is the weight of 80 books .

(ii) How many books will weight 10.8 kg.
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Answer 1

Answer:

54 books

Step-by-step explanation:

the weight of 45 books = 9 kg

the weight of 5 books will be = 1 kg

the weight of 1 book will be = 1 kg / 5 = 0.2 kg

i)the weight of 1 book = 0.2 kg

the weight of 80 books = 0.2 x 80 = 16 kg

ii)the weight of 1 book = 0.2 kg

the weight given = 10.8 kg

the number of books that weigh 10.8 kg = 10.8/0.2 = 54 books

Answer 2

• 45/9=5kg (1)80/5 =16kg (2)10.8*16=172.8kg