Particles of charge +65, +48 and -95 aC are placed in a line (Figure 1). The center one is L - 40 cm from
each of the others

the answer is c.)

explanation:

total distance travelled = 60 miles

total time taken =1.5 hours

average speed = total distance / total time

60 / 1.5

= 40

therefore, average speed = 40 m/h

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if the person is shown to have +90n, then ans is -10n.

if the person is shown to have -90n, then ans is +10n.