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Home/ Questions/Q 341393
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Prabha Loke
Prabha Loke
Asked: 3 years ago2022-10-30T17:13:30+05:30 2022-10-30T17:13:30+05:30In: Upsee

A train travels east towards Hubli at 80 km/hr. A man on the train runs from the front of the train toward the rear of the train at 10 km/hr with respect to train. As he runs, he carries a plate of fruit with him. He notices a giant spider on the plate and throws the plate away from him (toward the rear of the train) at 20 km/hr with respect to him. Just after that instant, the startled spider jumps towards the man at 5 km/hr with respect to plate. The instant after the spider jumps toward the man, how fast is the spider approaching Hubli?

(A) 45km/hr 

(B) 115 km/hr 

(C) 55 km/hr 

(D) 95 km/hr

A train travels east towards Hubli at 80 km/hr. A man on the train runs from the front of the train toward the rear of the train at 10 km/hr with respect to train. As he runs, he carries a plate of fruit with him. He notices a giant spider on the plate and throws the plate away from him (toward the rear of the train) at 20 km/hr with respect to him. Just after that instant, the startled spider jumps towards the man at 5 km/hr with respect to plate. The instant after the spider jumps toward the man, how fast is the spider approaching Hubli?

(A) 45km/hr 

(B) 115 km/hr 

(C) 55 km/hr 

(D) 95 km/hr

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  1. 561e0
    2022-11-06T00:30:56+05:30Added an answer about 3 years ago

    Correct option (C) 55 km/hr   

    Explanation:

    The relative velocity of man with the respect to train is 80 – 10 = 70 km/hr towards Hubli 

    The relative velocity of plate with respect to man is 70 – 20 = 50 km/hr towards Hubli 

    Therefore, velocity of spider approaching Hubli is 50 + 5 = 55 km/hr.

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