Question
A car travels a distance of200 km at the speed of 50
kmph. If it covers the ne×t 160 km of its journey at the speed of 80 kmph and last 80 km of its journey at the speed of 40 kmph. What is the average speed of the car?Solution
D1= 200 Km, S1= 50 Km/hr, D2= 160 Km, S2 = 80 Km/hr, D3= 80 Km, S3= 40 km/hr. T1= (Distance )/Speed = (200 )/50 = 4 hr. T2 = (Distance )/Speed = (160 )/80 = 2 hr. T3= (Distance )/Speed = (80 )/40 = 2 hr. Average Speed= (Total Distance )/(Total Time) = (440 )/8 = 55 km/hr.
64, 80, 120, 210, ?, 945
Find the missing number, in the given number series.
60, 150, ?, 450, 450, 225
What will come in place of the question mark (?) in the following series?
48, 291, ?, 399, 408, 411
98, 134, 198, ?, 442, 638
216, 81, 297, 378, ?, 1035, 1728
Which of the following numbers will replace the question mark (?) in the given series?
17, 30, 44, 59, 75, ?
114, 134, 174, 254, 414, ?Â
10296/72 + 3040 = (? × 4) + 1395
5, 6, 14, 45, ?, 925
4.8, 14, 62, ?, 1516, 7578Â
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