Mathematics
Grade6
Easy

Question

A blood bank collects 450ml of blood from 22 donors each. The total collection amounts to _______________ hectoliters.

  1. 0.58    
  2. 0.450    
  3. 0.125    
  4. 0.099    

Hint:

We are given the amount of blood collected from 1 donor. It is 450ml. There are 22 such donors. We are asked to find the total amount of blood collected in hectoliters. First, we will have to find the total amount of blood. And then will do the conversion.

The correct answer is: 0.099


    The amount of blood collected from one donor is 450ml.
    Number of donors is 22.
    So, to find the total amount of blood collected, we will have to multiply the number of donors and amount of blood collected per person.
    Total amount = Number of donors × amount per person
    = 22 × 450 ml
    = 9900 ml
    But, we are asked the total amount collected in hectoliters. So we will have to convert the value of total amount into hectoliters. To convert the given value, we should know the relation between the units.
    1 ml = 1 × 10 ^ -5 hectoliters
    So to convert 9900ml into hectoliters, we will have to multiply the value by 10^-5.
    9900 ml = 9900 × 10^-5 hectoliters
    = 0.099 hectoliters
    Therefore, the amount of blood collected in hectoliters is 0.099.

    For such questions, we should know how to convert units.

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