# X is faster than Y. X and Y each walk 36 km. The sum of their speeds i

| X is faster than Y. X and Y each walk 36 km. The sum of their speeds is 9 km/hr. and the sum of time taken by them is 18 hours. Then X’s speed is equal to :

A. 4 km/hr.

B. 5 km/hr.

C. 9 km/hr.

D. 6 km/hr.

### Right Answer is: D

#### SOLUTION

a^{2}-9a+18 = 0

(a-6)(a-3)= 0

Option D is correct.

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X is faster than Y. X and Y each walk 36 km. The sum of their speeds i