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Let C’s present age be x years. So, A’s present age = (x + 6) years And B’s present age = (x + 6 + 3) = (x + 9) years According to question, => x + 6 + x = 26 => 2x = 20 => x = 10 Required total sum = x + (x + 6) + (x + 9) = 3x + 15 = 45 years
A 240 m long train crosses a platform twice its length in 3 min. Find the speed of the train.
A train 480 metres long is running at a speed of 54 km/hr. If it crosses a tunnel in 1 minute, then the length of the tunnel (in meters) is:
A train can cross a pole, a bridge of 600 meter long and platform of 480 meter long in 14 seconds, _____ seconds and 30 seconds, respectively.
Calculate the speed of a train in meters per second if it covers a distance of 20 kilometers in 12 minutes.