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Ans 10:
Class : Class 9
Answer is C because A to B and B to A cycling is 5 min, so A to B and B to A walking is 15 min. So, 15 plus 15 = 30 min i.e. C.
Ans 12:
Class : Class 5
option B) cycling A to B = 10 min Cycle and walk back = A to B to A = 20 min = cycle 10 min = walk B to A = 20 - 10 =10. So, walk 2 times = A to B to A = 10 two times = 20B) 20 correct