NCERT Exemplar Solutions
Class 7 - Mathematics - Unit 2: Fractions and Decimals - Problems and Solutions
Question 66

Question. 66

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

(a) a 18 kg adult dog

(b) a 6 kg cat

(c) a 18 kg pregnant dog

Guidelines: Adult dogs: \(\dfrac{1}{2}\) tsp per 9 kg body weight; Puppies, pregnant or nursing dogs: \(\dfrac{1}{2}\) tsp per 4.5 kg; Cats: \(\dfrac{1}{4}\) tsp per 1 kg.

Answer:

(a) 1 tsp

(b) \(1\dfrac{1}{2}\) tsp

(c) 2 tsp

Detailed Answer with Explanation:

(a) Adult dog: \(18/9=2\) half-teaspoons → \(2\times\dfrac{1}{2}=1\) tsp.
(b) Cat: \(6\times\dfrac{1}{4}=\dfrac{6}{4}=1\tfrac{1}{2}\) tsp.
(c) Pregnant: \(18/4.5=4\) half-teaspoons → \(4\times\dfrac{1}{2}=2\) tsp.

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