Question
A boy can swim a certain distance downstream in 5 hours
and return in 7 hours. If the rate of stream is 4 kmph then what is the speed of boy in still water?Solution
Let the speed of the boy in still water be x kmph. Then, (x + 4) × 5 = (x – 4) × 7 => 5x + 20 = 7x - 28 => 2x = 48 => x = 24 kmph
3720 3842 ? 4092 4220 4350
...2Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â 4Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â 5Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â 19Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â 70...
Complete the series: 5, 20, 24, 6, 2, 8,?
12    16    43    ?       184    220
...2401 2402 1203 ? 105 26
...9 10 6 15 -1 ?
...D irection: Which of the following will replace ‘?’ in the following series
300, 300, 301, 303, ‘?’, 324, 364
...If 4 10 16 26 x 50
Then find the value of (x² - 1) + ( x² + 1).
...4Â Â Â Â Â Â Â Â Â 5.5Â Â Â Â Â Â Â Â Â Â Â 19 .5Â Â Â Â Â Â Â Â Â Â Â Â Â 98.5Â Â Â Â Â Â Â Â Â Â Â Â Â Â 694Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â 6251.5...
The question below is based on the given series I. The series I satisfy a certain pattern, follow the same pattern in series II and answer the questions...
