Question

The average temperature of tuesday, wednesday and thursday was 37°c. the average temperature of wednesday, thursday and friday was 38°c. if the temperature on friday was 39°c. find the temperature on tuesday.

Answer 1

Answer: 36

Step-by-step explanation:

(Tues+Wed+Thurs)/3 = 37

So, Tues+Wed+Thurs = 111.........................(1)

(Wed+Thurs+Fri)/3 = 38

So, Wed+Thurs+Fri = 114........................(2)

Given, Friday = 39

Subtract (1) from (2) -> Fri - Tues = 3

39 - Tues = 3

Tues = 36

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Answer 2

Answer:

The temperature on Tuesday is equal to 36°C.

Step-by-step explanation:

Consider that average temperature of Tuesday = x °C

Average temperature of Wednesday = y °C

Average temperature of Thursday = z °C

Average temperature of Friday = a = 39°C

We have given, the average temperature of Tuesday, Wednesday and Thursday is equal to 37°C.

$\frac{x+y+z}{3} =37$

$x+y+z=111$                                                                     .................(1)

We have also given,  the average temperature of Wednesday, Thursday and Friday is equal to 38°C.

$\frac{y+z+a}{3} =38$

$y+z+a=114$                                                                    ..................(2)

We have the value of a= 39, put in above equation (2);

$y+z+39=114$

$y+z =75^oC$

Put the value of (y + z) in equation (1);

$x+75=111$

$x=111-75$

$x=36^oC$

Therefore, the temperature on Tuesday is 36°C.