Question
The distance between town A and town B is 555 km. A train
leaves A at 7 a.m. at a speed of 60 km/h. Another train leaves B at 9 a.m. towards A at a speed of 90 km/h. At what time will they meet?Solution
The train from A starts 2 hours earlier.
Distance travelled = 60 × 2 = 120 km
Remaining distance = 555 – 120 = 435 km
Relative speed = 60 + 90 = 150 km/h
Time to meet = 435 / 150 = 2.9 hours = 2 hours 54 minutes
Meeting time = 9:00 a.m. + 2h 54m = 11:54 a.m.
9 14 38 129 ? 2705 16260
...Find the missing number in the given number series.
4, 9, 20, 37, 60, ?Find the missing number in the given number series.
512, 128, 32, 8, ?, 1What will come in place of (?) Question mark in the given number series.
28, 29, 38, 63, 112, 193, ?
24, 35, 48, 65, 84, 107
4, 10, 19, 30, 43, ?
188 178 158 ? 88 38
84, 97, ?, 162, 214, 279
63, 74, ?, 129, 173, 228
12, 14, 20, 32, ?, 82