Question
A car typically takes 15 hours to cover a distance of
240 km. However, after traveling 47.5% of the total distance at its usual speed, the car's speed decreases by 2 km/h. How much extra time will the car take to complete the entire 240 km under these new conditions?Solution
Usual speed of the car = 240 ÷ 15 = 16 km/h Reduced speed of the car = 16 - 2 = 14 km/h Distance covered at usual speed = 240 X 0.475 = 114 km Time taken to cover first 114 km = 114 ÷ 16 = 7.125 hours Time taken to cover the remaining distance = (240 - 114) ÷ 14 = 9 hours So, total time taken = 9 + 7.125 = 16.125 hours So, additional time = 16.125 - 15 = 1.125 hours
55 46 60 41 65 36 ?
124    174    211    ?     254    264
...3720 3842 ? 4092 4220 4350
...7 98 644 3145 12596 37797
...840 400 180 ? 15 -12.5
...9999 6666 ? 2962.66 1975.11 1316. 74
...2401 2402 1203 ? 105 26
...41 48 89 137 226 ?
...Three series are given below. You have to find the values of P, Q and R, then establish a relationship among them.
I:Â Â Â 210, P , 233, 64,...
32, 8, 4, ?, 3, 3.75
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