Question
John travelled a total distance of 432 km. He covered
5/8 of this distance at a constant speed of 30 km/h. To complete the entire journey in 13.5 hours, what speed must he travel the remaining distance at?Solution
(5/8) of 432 km = 270 km So, time taken to travel 270 km = 270 ÷ 30 = 9 hours Remaining distance = 432 - 270 = 162 km Remaining time = 13.5 - 9 = 4.5 hours So, speed at which remaining distance is to be travelled = 162 ÷ 4.5 = 36 km/h
Find the wrong number in the given number series.
120, 126, 138, 162, 220, 306
217Â Â Â Â 210Â Â Â Â Â 236Â Â Â Â Â 299Â Â Â Â Â 423Â Â Â Â 640
...112, 222, 440, 872, 1717 , 3424
In each of the following giving number series, a wrong number is given. Find out the wrong number?
82, 81, 86, 110, 168, 287
- 78, 86, 71, 95, 60, 112
2100, 2140, 2186, 2240, 2300, 2372
9, 10, 12, 18, 42, 160
A-5,  A,  35,  52, 78, 115
Find the wrong number in the given number series.
233, 206, 183, 152, 125, 98
Find the wrong number in the given number series.
2, 4, 12, 48, 120, 1440
