Sid bought a collection of 15 identical books for selling. Each book weighed 400 gram. Find the total weight of the collection.
Weight of one book = 400 g
Weight of 15 books = 400 x 15
= 6000 grams
Convert 6000 g to kg
1000 g = 1 kg
Therefore 6000 = 60001000
= 6 kg
Answer : option C. 6 kg