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1.what is 40÷2?

10.
42
0
20

2.what is 2×5

7
20
100
10

3.what is √9

81
9
2
3

I started riding bike from my home at 13.00pm with 10km/h speed, and when I arrived my school the time was 13.15 pm. What is the distance between my home and my school?