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The distance covered by a train in (x + ...

The distance covered by a train in (x + 1) hours is `(x^3+ 1)` km. What is the speed of the train?
(x + 1) घंटे में ट्रेन द्वारा तय की गई दूरी `(x^3+ 1)` किमी है। ट्रेन की चाल क्या है?

A

`(x^3-1)` km/h

B

`(x^2-x+1)` km/h

C

`(x^2+x+1)` km/h

D

`(x+1)` km/h

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