Question
A car moving at 72 km/h is brought to rest in 10
seconds. What is its acceleration? ÂSolution
First convert 72 km/h to m/s 72×1000/3600=20m/s Initial velocity u = 20m/s Final velocity v = 0 Time = 10 sec A= (v-u)/t = (0-20)/10 = 2m/s2 Negative sign shows retardation (deceleration).
What will come in place of the question mark (?) in the following series?
1.5, 3.5, 9.5, 27.5, 81.5, 243.5, ?
6    11    32    111    ?   2345   14100
...3, 10, 29, 66, ?
Find the missing number in the given number series.
6, 15, 35, 66, 108, ?18, 30, 54, 90, 138, ?
11    16    42    141    ?   2945   17700
...18, 54, ? , 1890, 17010, 187110
14, 15, 24, 49, 98, 179, ?
124, 180, 108, 198, ?, 220
What will come in place of the question mark (?) in the following number series?
17, 28, 48, ?, 123, 182
