Question
Boat ‘A’ can cover 120 km in still water in 12
hours. In still water, if the ratio of the speed of boat ‘A’ to that of ‘B’ is 5:4 and the speed of stream is 3 km/hr then find the time taken by boat ‘B’ to cover the 264 km in downstream.Solution
Speed of boat ‘A’ in still water = 120/12 = 10 km/hr Speed of boat ‘B’ in still water = 10 × (4/5) = 8 km/hr Downstream speed of boat ‘B’ = 8 + 3 = 11 km/hr Time taken by boat ‘B’ to cover 264 km in downstream = 264/11 = 24 hours
20Â Â Â 60Â Â Â Â 150Â Â Â Â 300Â Â Â 450Â Â Â ?
24 47 137 ? 2679 16049
...6Â Â Â Â Â Â Â Â Â Â Â Â Â 7Â Â Â Â Â Â Â Â Â Â Â Â Â 15Â Â Â Â Â Â Â Â Â Â 46Â Â Â Â Â Â Â Â Â Â 185Â Â Â Â Â Â Â Â ?
...203, 223, 198, 218, ?, 213
5     16     ?      66     119      200
...30 29 91 446 ? 28217
11Â Â Â 46Â Â Â 109Â Â Â 208Â Â Â Â 351Â Â Â Â ?
28 34 63 ? 769 3847
...In the question, three series I, II and III are given. Find the value of x, y and z to establish the correct relation among them and choose the correct...
30, 39, 66, ? , 174, 255
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