Let radius of cylinder & cone be 8x and height of cylinder & cone be 15x. So, slant height = √ (8x 2 + 15x 2 ) = 17x So, required ratio = 2 πR (H + R)/ π r (L + R) = 2(H + R)/(L+ R) = 2(8x + 15x)/(8x + 17x) = 46/25
The ratio of the speed of boat in upstream to speed of boat in downstream is 7:9. If the boat can cover a total of 49 km upstream and 81 km downstream i...
A Boy can swim 12 km/hr in still water. If the velocity of the stream is 6 km/hr, the time taken by him to swim a place 28 km upstream and back is
Find the total distance covered by boat in still water in 8 hours if the speed of boat in upstream and in downstream is 10 km/h and 15 km/h respectively?
Boat ‘A’ can cover 120 km in still water in 10 hours. In still water, if the ratio of the speed of boat ‘A’ to that of ‘B’ is 4:5 and the sp...
A boat covers 32 km upstream and 40km downstream in 8 hours while it covers 40km upstream and 32 km downstream in 8.5 hours. What is the velocity of cur...
The speed of a boat in still water is 16/ 3 km/ h. It was found that the boat takes thrice as much time to row up as it does to row down the same distan...
Speed of boat in still water is 60% more than speed of current and total time takes by boat to cover certain distance going downstream and upstream is ...
The speed of the boat and the speed of the stream is 15km/hr and 3km/hr individually. The boat travel for a period of 3 hours upstream and 4 hours downs...
A motorboat in still water travels at a speed of 36 km/hr. It goes 64 km upstream in 2 hours. The time taken by it to cover the same distance down the s...
The boat's speed in still water is 20% greater than the speed of the stream. If it takes the boat 4 hours more to travel 176 km d...
