Question

please solve this question 4,5,6,7

Answer 1

4. Actually i don't know the answer of 4th...
5. She walks 12 m east and returns 5 m, it means like this:-   12m-5m = 7m
     so she is 7m far from the place she started 
6. it will be angle of incidence
7. The probability must be 3/8

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