NCERT Exemplar Solutions
Class 7 - Mathematics - Unit 2: Fractions and Decimals - Problems and Solutions
Question 82

Question. 82

82. Meteorology: See the table and answer:

Year19581964196519782002
Difference from Base0.10°C−0.17°C−0.10°C(1/50)°C0.54°C

(a) Order the five years from coldest to warmest.

(b) In 1946, the average temperature varied by −0.03°C. Between which two years should 1946 fall when the years are ordered?

Answer:

(a) 1964, 1965, 1978, 1958, 2002

(b) Between 1965 and 1978

Detailed Answer with Explanation:

Coldest = smallest difference. Order ascending: −0.17 (1964), −0.10 (1965), 0.02 (≈1/50, 1978), 0.10 (1958), 0.54 (2002). −0.03 lies between −0.10 and 0.02, so between 1965 and 1978.

NCERT Exemplar Solutions Class 7 – Mathematics – Unit 2: Fractions and Decimals – Problems and Solutions | Detailed Answers