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The label on a bottle of pet vitamins lists dosage guidelines. What dosage would you give to each of these animals? - Mathematics

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Question

The label on a bottle of pet vitamins lists dosage guidelines. What dosage would you give to each of these animals?

  1. a 18 kg adult dog
  2. a 6 kg cat
  3. a 18 kg pregnant dog

Do Good Pet Vitamins

  • Adult dogs:

`1/2` tsp (tea spoon full) per 9kg body weight

  • Puppies, pregnant dogs, or nursing dogs:

`1/2` tsp per 4.5kg body weight

  • Cats:

`1/4` tsp per 1kg body weight

Sum

Solution

a. Dosage prescribed for an adult dog is `1/2` tsp per 9 kg body weight.

∴ For a 18 kg adult dog, dosage = `((1/2))/9 xx 18`

= `1/(2 xx 9) xx 18`

= `1/18 xx 18`

= 1 tsp

b. Dosage prescribed for a cat is `1/4` tsp per 1 kg body weight.

∴ For a 6 kg cat, dosage = `((1/4))/1 xx 6`

= `1/4 xx 6` tsp

= `6/4 = 3/2` tsp

= `1 1/2` tsp

c. Dosage prescribed for pregnant dogs is `1/2` tsp per 4.5 kg body weight.

∴ For an 18 kg pregnant dog, dosage = `((1/2))/4.5 xx 18`

= `1/(2 xx 4.5) xx 18`

= `1/9 xx 18`

= `18/9` tsp

= 2 tsp

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Chapter 2: Fractions and Decimals - Exercise [Page 45]

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NCERT Exemplar Mathematics [English] Class 7
Chapter 2 Fractions and Decimals
Exercise | Q 66. | Page 45

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