Question
Boat ‘A’ can cover 100 km in still water in 10
hours. In still water, if the ratio of the speed of boat ‘A’ to that of ‘B’ is 2:3 and the speed of stream is 3 km/hr then find the time taken by boat ‘B’ to cover the 378 km in downstream.Solution
Speed of boat ‘A’ in still water = 100/10 = 10 km/hr Speed of boat ‘B’ in still water = 10 × (3/2) = 15 km/hr Downstream speed of boat ‘B’ = 15 + 3 = 18 km/hr Time taken by boat ‘B’ to cover 378 km in downstream = 378/18 = 21 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
Relevant for Exams:
