The speed of a boat in still water is 7 km/hr and speed of current is 4 km/hr. If time taken to cover a certain distance upstream is 22 hours, then how long will the boat take to cover the same distance downstream?
Total distance = 22 × (7 – 4) = 66 km Required time = 66/(7 + 4) = 6 hrs
2 5 16 65 326 ?
362 284 393 451 144 221
...27 28 37 62 111 ?
Direction: Which of the following will replace ‘?’ in the given question?
10, 12, ‘?’, 27, 36, 45, 54, 63, 72
16 18 14 20 12 ?
...14 20 35 ? 433 2167
...15 25 40 65 ? 195
43 ? 45 39 47 37
...Complete the series.
19, 23, 26, 30, 33, ?
1 2 6 ...
