Question

30bulbs are connected in series if one bulb is fused remaining 29bulbs ate joined and connected in series and connected to same supply the light will be

Answer 1

Other bulbs will stop glowing because they are connected in series

Answer 2

Hi friend, Harish here.

Here is your answer:
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Given that all the 30 bulbs were connected in series. But when the first bulb fuses the filaments in the bulb breaks.

When it  breaks the currents stops flowing through it because all other bulbs are connected in series and the rest bulbs doesn't glow.
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Hope my answer is helpful to you.