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World Post day happens each year on October 9, the anniversary of the Universal Postal Union, which started in 1874 in Switzerland. The UPU was the start of the global communications revolution, introducing the ability to write to others all over the world. World Post Day started in 1969.
The ratio of downstream speed to upstream speed of a boat is 5:3. If the boat can cover 160 km in still water in 10 hours, then find the difference betw...
The speed of the stream is 12 km/h, and the speed of the boat in still water is 50% greater than the speed of the stream. Calcula...
A, B and C started a business by investing in the ratio 1/5 : 1/4 : 2/6. After 6 months C withdrew 1/4 of his investment. If after 1 year from start of ...
The ratio of speed of the boat and the speed of the current is 6:5. If the downstream speed of the boat is 44 km/hr. Then find how much distance will th...
Speed of boat is 20 km/hr. Speed of the stream is 20% less than speed of boat. Then find time taken by boat to go 72 km downstream?
A boatman covers 192 km upstream in 4 hours and 288 km downstream in 4 hours. Find the time taken by the boatman to cover 240 km in still water.
A man can row 12 km/hr in still water. If the speed of the current is 3 km/hr, it takes 4 hours more in upstream than in the downstream for the same dis...
A boat can travel 21 km downstream in 42 min. The ratio of the speed of the boat in still water to the speed of the stream is 5: 1. How much time will t...
The ratio of the speed of boats ‘A’ and ‘B’ in still water is 8:9, respectively. The speed of the current is 25% of the speed of boat ‘A’ in...