Question
Reshma covers 45 km at a speed of 15 km/h by bicycle, 80
km at a speed of 40 km/h by car, and another 6 km at a speed of 2 km/h on foot. Find her average speed for the whole journey (correct to 2 decimal places).Solution
ATQ, we can say that Reshma covers first 45 km at the speed of 15 km/hr she covers next 80 km at the speed of 40 km/hr. she covers next 6 km at the speed of 2 km/hr Formula used: Average speed = Total distance/Total time Calculation: Total distance covered = 45 + 80 + 6 = 131 km Total time = (45/15) + (80/40) + (6/2) = 3 + 2 + 3 = 8 hr ∴ Average speed = 131/8 kmph = 16.375 or 16.38km/hr
What will come in place of (?) Question mark in the given number series.
1, 2, 5, 14, 41, 122, ?
- What will come in place of (?), in the given number series.
2, 3, 5, 8, 12, ? What will come in place of (?) question mark in the given number series.
22, 23, 19, 28, ?, 37
60, 100, 160, 240, ?, 460
What will come in place of the question mark (?) in the following series?
35, 38, 46, ?, 85, 120
10, 10, 15, 30, 75, ?
What will come in place of the question mark (?) in the following series?
15, 16, 25, 50, 99, 180, ?
864, 432, 144, ? , 7.2, 1.2
What will come in place of the question mark (?) in the following series?
34, 61, 7, ?, -20, 115
23 45 89 155 ? 353
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