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28 B 3 C 30 A 6 D 10 B 4 28 × 3 + 30 ÷ 6 - 10 × 4 (28 × 3 + 5 – 10 × 4) = (84 + 5 - 40) = (89 - 40) = 49.
A man travels some distance at a speed of 20 km/hr and returns at a speed of 15 km/hr. If the total time taken by him is 3 hrs 30 min, the distance is
A train 240 meters long passes a platform in 24 seconds and a pole in 16 seconds. Find the length of the platform.
In a kilometre race, A beats B by 30 metres or 6 seconds. Find the time taken by A to finish the race?