A submarine is travelling below the surface of the water. Every minute it travels another 10 metres farther under the surface. How many minutes will it take the submarine reach a depth of 240 metres?a120 b100c65 d24

Choo Kheng must travel at least   kilometers in a submarine in order to reach her destination. The submarine travels at a constant speed on the water's surface, and travels at a constant speed underwater. In the given inequality,   represents the number of hours the submarine can travel on the water's surface and   represents the number of hours it can travel underwater in order to reach Choo Kheng's destination. If the submarine travels for   hours on the water's surface, what is the least number of hours the submarine must travel underwater in order for Choo Kheng to reach her destination?

A motor boat takes 12 hours to go downstream and it takes 24 hours to return the same distance. What is the time taken by boat in still water ?   Select an answerA15 hB16 hC8 hD20 h

A ship anchored in a port has a ladder which hangs over the side. The length of the ladder is 200cm, the distance between each rung in 20cm and the bottom rung touches the water. The tide rises at a rate of 10cm an hour. When will the water reach the fifth rung?

The time taken by a boat to go to a certain distance against the current is the same as to go the double distance along the current. The speed of the current is 3 km/h. How much time will the boat take to travel 57.6 km in still water?

The speed of a boat in still water is 6 kmph and the speed of the stream is 1.5 kmph. A man rows to a place at a distance of 22.5 km and comes back to the starting point. The total time taken by him is?Options10 hours6 hours 10 minutes8 hours4 hours 10 minutes