Question
Train D leaves Lucknow at a certain time. After 4 hours, a
special express leaves the same station and travels in the same direction at the speed of 140 km/h. If the special express catches up Train D in 10 hours, then what is the speed of Train D?Solution
Distance travelled by the special express in 10 hours = 140 × 10 = 1400 km
Speed of Train D = 1400 / (4 + 10) = 100 km/hr
A = (9/4) × B and C = (1/12) × A. If (A + B + C) = 300, then find the value of (12C – B).
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