Time, Speed and Distance (Part-7)

Total Questions: 50

41. The speed of light is very nearly equal to 3 x 10¹⁷ nanometre per second. How much time (in seconds), approximately, does it take light to travel from the moon to the earth, the average distance between them being 384000 km? (1 nanometre = 10⁻⁹ metre) [SSC MTS 02/11/2021 (Evening)]

Correct Answer: (d) 1.28
Solution:

42. Two clocks were synchronized at 11 a.m. on a Sunday. Thereafter, every day they were, respectively, found to gain and lose one minute per day. What time, expressed in hours and minutes, will the second clock show when the first clock shows 10 p.m. on the next Friday? [SSC MTS 12/10/2021 (Afternoon)]

Correct Answer: (c) 9 hours 49¹⁄₁₂ minutes p.m.
Solution:

43. A takes 8 hours more than the time taken by B to cover a distance of 160 km. If A doubles his speed, he takes 3 hours more than B to cover the same distance. Speed of B (in km/h) is? [SSC CGL 17/08/2021 (Morning)]

Correct Answer: (b) 80
Solution:

Speed of A = 1:2
Time of A = 2:1
(2-1) unit = (8-3) hours = 5 hours
⇒ 2 unit = 10 hours
Time of B is 8 hours less than A
Time of B = 10 - 8 = 2 hours
Speed of B = 160/2 = 80 km/h

44. Akhil takes 30 minutes extra to cover a distance of 150 km if he drives 10 km/h slower than his usual speed. How much time will he take to drive 90 km if he drives 15 km per hour slower than his usual speed? [SSC CGL 18/08/2021 (Morning)]

Correct Answer: (b) 2 h
Solution:

45. A person moved from place A for place B at 2 p.m at a speed of 4.5 km/h, stayed at place B for 1.5 hours and returned to place A at a speed of 6 km/h. He came back to place A at 7 p.m. What is the distance (in km) between places A and B. [SSC CHSL 13/4/2021 (Evening)]

Correct Answer: (c) 9
Solution:

46. Two cars X and Y start running towards each other from two places 216 km apart. The ratio of the speeds of X and Y is 5:7 and the speed of X is 60 km/h. After how many minutes will X and Y meet each other? [SSC CHSL 19/04/2021 (Morning)]

Correct Answer: (c) 90
Solution:

47. A train travels at a speed of 66 km/h and halts at five junctions for a certain time. It covers a distance of 1485 km in one day. For how long (in minutes) does the train stop at each junction, if it halts for the same period of time at all the junctions? [SSC CHSL 05/08/2021 (Afternoon)]

Correct Answer: (b) 18
Solution:

48. During his morning walk, Atul walks for 45 minutes at a speed of 8km/h and takes 15 rounds of a park. Shekhar takes 10 rounds of the same park in 40 minutes. What is the speed of Shekhar in km/h? [SSC CHSL 05/08/2021 (Evening)]

Correct Answer: (b) 6
Solution:

49. Ajit Singh left from place Pat 9:30 am for place Q, and David Raj left place Q at 1:30 for place P. The distance between them is 416 km. If Ajit Singh's speed is 44 km/h and David Raj's speed is 52 km/h, then at what time will they meet each other? [SSC CHSL 11/08/2021 (Afternoon)]

Correct Answer: (d) 4 pm
Solution:

50. A and B start moving towards each other X and Y, respectively, at the same of A is 20% more than the speed of B. After meeting on the way, A and B take p hours and 7⅕ hours, respectively. What is the value of p ? [SSC CGL Tier II (15/11/2020)]

Correct Answer: (a) 5
Solution: