A railway engine moves with the speed of 42 km/h. The reduction in spe – McqOptions

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1.	A railway engine moves with the speed of 42 km/h. The reduction in speed varies as the square root of the number of compartments attached to it. The speed is 24 km when 9 compartments are attached. What is the maximum number of compartments that the engine can pull
A.	47
B.	48
C.	49
D.	42
Answer» C. 49

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