Mathematics
Grade-3-
Easy

Question

An adult manatee has a mass of about 450 kilograms. What is the mass of 4 adult manatees? 

  1. 900kg
  2. 1800kg
  3. 450kg
  4. 600g

hintHint:

This question is based on unitary method. The mass of an adult manatee is given and we are required to find the mass of 4 adult manatees. So, we need to simply find the product of the number of the adult manatees and the mass of 1 adult manatee.

The correct answer is: 1800kg


    Step by step solution:
    Given,
    mass of one adult manatee = 450 kilograms
    number of adult manatees whose weight is to be found = 4
    Therefore, total mass = 4 x 450 kilograms
    = 1800 kilograms
    Thus, 4 adult manatees have a mass of 1800 kg.
    Hence, option(b) is the correct option.

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