Question
The speed of βAβ and βBβ is 60 km/hr and 30
km/hr, respectively. If the distance covered by βAβ in βxβ hours is 240 km more than that by βBβ in the same time, then find the value of βxβ.Solution
If the time is same, then the ratio of the speeds is equal to the ratio of the distance covered Therefore, ratio of the distance covered by βAβ and βBβ = 60:30 = 2:1 Let the distance covered by βAβ and βBβ be 2y km and 1y km, respectively According to the question, 2y β y = 240 Or, y = 240/1 = 240 Therefore, distance coved by βAβ = 2y = 480 km Time taken by βAβ = x = 480/60 = 8 hours
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