Give an example each of a situation where:
(a) accurate measurement is necessary
(b) accurate measurement is not necessary and only estimation is required Give reasons.

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Solution

(a) Accurate measurements are of importance in situations where extreme precision is essential, such as in scientific experiments or in construction of fine tolerance machinery. Here
even an error in measurement of weight by 0.1 g can completely change the result of an experiment.
(b) Estimation will suffice in most daily, domestic situations such as the mixing sugar or salt in food items. Here, a difference of 0.1 g in the amount of salt or sugar in food will not even be noticed.

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