Question

Nicholas recorded the temperature every hour from 8:00 am to 1:00 pm. The temperature at 8:00 am was 17°C. The temperature dropped 4°C every hour. What was the temperature at 1:00 pm? Option a) 5°C. Option b) 13°C. Option c) 17°C. Option d) 21°C.

Answer 1

It forms an AP

a = 17, d = -3

time duration = 5 = n

an = a + (n - 1)d

= 17 + (5 - 1) x -3

=17 + 4 x -3

=17 - 12

=5°C

a) 5°C