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NCERT Exemplar Solutions Class 7 Mathematics Solutions for Fractions and Decimals - Exercise in Chapter 2 - Fractions and Decimals

Question 4 Fractions and Decimals - Exercise

Meteorology: One measure of average global temperature shows how each year varies from a base measure. The table shows results for several years.

Year Difference from Base
1958 -0.9°C
1964 -0.17°C
1965 -0.10°C
1978 [[> widget id="1" <]]
2002 0.54°C

In 1946, the average temperature varied by -0.03°C from the base measure. Between which two years should 1946 fall when the years are ordered from coldest to warmest?

Answer:

In 1946, the average temperature varied by -0.03°C.

Then -0.10^{\circ}\mathrm{C}<-0.03^{\circ}\mathrm{C}<\left(\frac{1}{50}\right)^{\circ}\mathrm{C}

Therefore, 1946 should lies between 1965 and 1978.

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