Question 1
4.236
5.325
6.408
3.259
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Solution: We know, Speed = Distance/Time = 750/7*60 = 1.78 m/sec To convert m/sec to km/hr 1.78*18/5 =6.408 km/hr
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Question 2
137.42
135.36
133.33
122.35
Solution: We know, Distance = Speed *Time =(80 x 5) = 400 km. If, Speed = Distance/Time Required Speed = 400/3 km/hr. = 133.33 km/hr
Question 3
32
40
52
36
Solution: Assume, The genuine distance Neha is covering = xkm/hr Therefore, x/8 = x+30/14 14x = 8x + 240 6x = 240 x = 240/6 = 40
Question 4
10
9
12
15
Solution: According to the question, the average speed of a train, With stoppage = 120 km/hr Without stoppage = 90 km/hr Distance left = 12090 = 30 km Time consumed to cover the remaining distance = (30/120)*60 = 15hrs.
Question 5
23.21
30.28
25.23
31.25
Solution: Let, the distance covered while walking = x km Distance covered on tractor = 110 – x Time = Distance /Speed x/4 + (110x)/18 = 12 9x + 220 – 2x = 432 7x = 432220 7x = 212 x = 212/7 = 30.28 km
Question 6
220
215
250
236
Solution: We know, Distance = Speed *Time = (110 x 4) = 440 km. If, Speed = Distance/Time Required Speed = 440/2 km/hr. = 220 km/hr
Question 7
4.52
5.36
3.78
2.5
Solution: We know, Speed = Distance/Time = 950/15*60 = 1.05 m/sec To convert m/sec to km/hr 1.05*18/5 = 3.78 km/hr
Question 8
8.375
5.369
3.265
4.256
Solution: Total Distance = 670km/hr Total time is taken when the average speed is 120km/hr = 7 hours Total time is taken when the average speed is 80 km/hr=? We know, Time = Distance/Speed Time = 670/80 = 8.375 hours
Question 9
48
24
Solution: The speed of the bus1 = 4x Speed of the bus2 = 5x According to the question, speed of bus1 = 5x= 100/2= x= 10 Therefore, speed of the bus1 = 4(10) = 40 km/hr
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March 26, 2021
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