Question
A goods train leaves a station at a certain time and at
a fixed speed. After 9 hours, an express train leaves the same station and moves in the same direction at a uniform speed of 176 km/hr, this train catches up the goods train in 7 hours. Find the speed of the goods train.Solution
Let the speed of the goods train be ‘s’ km/hr Distance covered by goods train in 16 hrs = s x 16 km Distance covered by express train in 7 hrs = 7 x 176 km Distance covered by goods train in 16 hrs = Distance covered by express train in 7 hrs So, 16s = 7 × 176 ⇒ 16s = 1232 ⇒ s = 1232/16 = 77 So, Speed of goods train = 77 km/hr
Find the wrong number in the given number series.
27, 388, 712, 996, 1243, 1452
18Â Â Â Â Â 45 Â Â Â Â Â 90 Â Â Â Â Â Â 235Â Â Â Â Â 450 Â Â Â Â Â 1125 Â Â Â Â Â 2250
...A series is given below which contains a wrong term.
(4c – a – 10) , (3b + a – 1) , (bc + a – 1) , (ac + 7b) , (ab + ac + bc + 18) , (3b<...
Find the wrong number in given series.
918, 943, 992, 1073, 1194, 1388
 7    12     33    126    635  Â
1, 4, 20, 126, 1026, 10170
42, 85, 172, 343, 687, 1375
Find the wrong number in the given number series.
7, 12, 19, 28, 39, 53, 67
3, 15, 35, 63, 99, 143
6.5, 11, 22, 25.5, 51, 54.5
