Comprehension Passage
Direction: Study the following data carefully and answer the questions.
The pie chart given below shows the degree distribution of total carbon emissions in 4 different cities P, Q, R and S in the year of 2023.

Note: a2 + b2 = 1300
a and b are whole numbers.
If the average carbon emission in cities Q, R and S is 90 kt and 20% of total carbon emission in city Q, 60% of total carbon emission in city R and 55% of total carbon emission in city S is in the 2nd half of 2023, then find the average carbon emission in cities Q and R in the 1st half of 2023?
1
46 kt
2
48 kt
3
52 kt
4
35 kt
5
34 kt