# If on Thursday temperature is 45°C, what was it on Monday?

The average temperature for Monday, Tuesday and Wednesday was 40°C. The average for Tuesday, Wednesday and Thursday was 41°C. If on Thursday temperature is 45°C, what was it on Monday?

- 40°C
- 41°C
- 42°C
- 43.5°C

**Answer: (3) 42 degree Celsius **

**Explanation:-**

The average temperature for Monday, Tuesday and Wednesday = 40 degree

Therefore, the sum of temperature of Monday, Tuesday and Wednesday = 3 x 40

= 120 degree

The average temperature for Tuesday, Wednesday and Thursday = 41 degree

Therefore, the sum of temperature of Tuesday, Wednesday and Thursday = 3 x 41

= 123 degree

The temperature of Thursday = 45 degree

Then, the temperature of Tuesday and Wednesday = 123 – 45

= 78 degree

So, the temperature on Monday = 120 – 78

= 42 degree Celsius.

Hence, the correct answer is option (3) 42 degree Celsius.