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Mohan travels at X km/hr, he takes (y + 1) hours to cover A km. He travels (x + 10) km/hr, he takes y hours to cover A km. He travels at (x – 10) km/hr, he takes (y + 1) hours to cover A km. From the given statement which of the following can be determined? A. Value of x B. Value of y C. Value of A D. Find the distance covered by him when he travels at (x + 4) km/hr for (y + 2) hours.

Mohan travels at X km/hr, he takes (y + 1) hours to cover A km. He travels (x + 10) km/hr, he takes y hours to cover A km. He travels at (x – 10) km/hr, he takes (y + 1) hours to cover A km. From the given statement which of the following can be determined? A. Value of x B. Value of y C. Value of A D. Find the distance covered by him when he travels at (x + 4) km/hr for (y + 2) hours. Correct Answer All of them

According to given conditions:

A = (x)(y + 1)    ---(1)

A = (x + 10) (y)    ---(2)

A = (x – 10) (y + 1)    ---(3)

From (1) and (2)-

(x)(y + 1) = (x + 10) (y)

⇒ x – 10y = 0    ---(4)

From (2) and (3)-

⇒ (x - 10) (y + 1) = (x + 10) (y)

⇒ x – 20Y = 10    ---(5)

On solving equations (4) and (5)-

⇒ x = 10km/hr

⇒ y = 1hr

⇒ A = x (y + 1) = 10 (1 + 1) = 20 km.

By Option D:

Distance covered = (10 + 4) (1 + 2) = 42 km.

∴ All of them can be found.

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