Question
A ferry takes 75 minutes to row to place B from another
place A along the stream. The distance between place A and place B is 37.5 km. If the speed of the ferry in still water is four times more than that of the stream, then how much distance will the ferry cover in 4.7 hours against the stream?Solution
Let the speed of the stream be 'M' km/h Speed of the ferry in still water = (4M + M) = 5M km/h Downstream speed = (5M + M) = 6M km/h Upstream speed = (5M – M) = 4M km/h Acc. to the question, 37.5 = 6M × (75/60) M = 5 km/h Upstream speed = 4M = 4 × 5 = 20 km/h Distance travelled = 4.7 × 20 = 94 km
0Â 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 26Â Â Â Â Â Â Â Â Â Â 63Â Â Â Â Â Â Â Â Â Â 126Â Â Â Â Â Â Â Â 215
...Find the wrong number in the given number series.
16, 24, 36, 54, 81, 120.5
11Â Â Â Â Â Â Â Â Â Â 9Â Â Â Â Â Â Â Â Â Â Â Â Â 20Â Â Â Â Â Â Â Â Â Â 18Â Â Â Â Â Â Â Â Â Â 37Â Â Â Â Â Â Â Â Â Â 36
...- Find the wrong number in the given number series.
2, 27, 252, 877, 2102, 4127 Find the wrong number in the given number series.
8, 16, 24, 32, 32, 64
Find the wrong number in the given number series.
7, 15, 46, 93, 282, 561
324, 314, 294, 264, 224, 184
Find the wrong number in the given number series.
11, 30, 67, 133, 219, 346
In each of the following giving number series, a wrong number is given. Find out the wrong number?
82, 81, 86, 110, 168, 287
- In the given number series, find the wrong number.
3, 6, 12, 25, 48, 96, 192
