Question
A person covers a certain distance by car, driving at
the speed of 90 kmph and returns back to the starting point, riding on a bike at the speed of 60 kmph. What is his average speed for the whole journey?Solution
Average speed = 2xy/(x+y) = (2 × 60 × 90)/(90+60) = 72 km / hr.
More Time and distance Questions
Find the wrong number in the given number series.
3, 8, 15, 24, 35, 50, 63Find the wrong number in the given number series.
12, 13, 68, 29, 220, 51
40, 56, 85, 129, 190, 268
- Find the wrong number in the given number series.
2, 5, 9, 14, 20, 28 95, 139, 191, 251, 319, 380
- Find the wrong number in the given number series.
27, 38, 52, 70, 94, 122 Find the wrong number, in the given number series,
1680, 840, 2520, 630, 3150, 475
- Find the wrong number in the given number series.
1, 2, 6, 24, 120, 600 15, 27, 51, 99, 193, 387
Find the wrong number in the given number series.
8, 12, 24, 60, 180, 540
