Question

The average temperature of the town in the first four days of a month was 58 degrees. The average for second, third , fourth, and fifth days was 60 degrees. If the temperatures if the first and fifth days were in the ratio 7 : 8 , then what is the temperature on the fifth day ?

• A. 64 degrees
• B. 62 degres
• C. 56 degrees
• D. 48 degrees

Answer 1

The correct option is A 64 degrees

Sum of temperatures on 1st, 2nd, 3rd and 4th days = (58 x 4) = 232 degrees .....(1)
Sum of temperatures on 2nd, 3rd, 4th and 5th days = (60 x 4) = 240 degrees .....(2)
Subtracting equ (1) from equ (2), we get
Temp. on 5th day - Temp. on 1st = 8 degrees
Given, Temp. on 1st day : Temp. on 5th day = 7 : 8
$\therefore$ 8x - 7x = 8 $\Rightarrow$ x = 8
$\therefore$ Temperature on 5th day = 64 degrees.