Question
A train has to cover a distance of 400 km in 25 hours.
If it covers half journey in 3/5th time, then the speed of covering the remaining distance in the time left has to be:Solution
Speed = Distance/time = 400/25 = 16 km/hr According to the question, New time = 3/5 x 25 = 15 hrs New distance = 1/2 x 400 = 200 km Required speed = Distance left/Time left = 200/10 = 20 km/hr
If + means ÷, ÷means –, –means ×, × means +, then 200 + 10 ÷ 10 – 10 × 5 = ?
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