Question
Two cars X and Y start from two places A and B
respectively which are 800 km apart at 8 a.m. Both the cars run at an average speed of 50 km/hr towards each other. Car X stops at 9 a.m. and again starts at 10 a.m. While the other car Y continues to run without stopping. When do the two cars cross each other?Solution
Till 10 a.m. Dist. Covered by X = 50 km and Till 10 a.m. Dist. Covered by Y = 100 km Remaining distance to be covered at 11 a.m. = 800 – 150 = 650 km Relative speed of X and Y = 100 Km / hr ∴ Time taken = 650/100 =13/2 hrs. = 6 hrs. 30 min. ∴ Two cars will cross each other at 4.30 p.m.
25, 32, 47, 77, 126, 198
- Find the wrong number in the given number series.
350, 289, 238, 197, 158, 145 15, 34, 13, 32, 11, 28
Find the wrong number in the given number series.
24, 120, 721, 5040, 40320, 362880
72, 80, 89, 153, 180, 394Â
360, 322, 286, 248, 220, 190
3Â Â Â Â Â 5Â Â Â Â Â Â 9Â Â Â Â Â 17 Â Â Â Â Â Â 32 Â Â Â Â Â Â Â 65
...Find the wrong number in the given number series.
65, 91, 127, 163, 217, 271
1, 1, 3, 15, 105, 942
120, 139, 196, 291, 420, 595