Basic Numeracy/Quantitative Aptitude

905. A bus without stopping travels at an average speed of 60 km/hr and with stoppages at an average speed of 40 km/hr. What is the total time taken by the bus for stoppages on a route of length 300km?

	(a) 4 hr
	(b) 3 hr
	(c) 2.5 hr
	(d) 3.5 hr

906. The speed of a bus during the second hour of its journey is twice that in the first hour. Also, its speed during the third hour is two-third the sum of its speeds in the first two hours. Had the bus travelled for three hours at the speed of the first hour, it would have travelled 120 km less. Find the average speed of the bus for the first three hours.

	(a) 60 kmph
	(b) 70 kmph
	(c) 80 kmph
	(d) 100 kmph

907. Arun, Barun and Kiranmala start from the same place and travel in the same direction at speeds of 30, 40 and 60 km per hour respectively. Barun starts two hours after Arun. If Barun and Kiranmala overtake Arun at the same instant, how many hours after Arun did Kiranmala start?

	(a) 3
	(b) 3.5
	(c) 4
	(d) 4.5

908. Karan and Arjun run a 100-meter race, where Karan beats Arjun 10 metres. To do a favour to Arjun, Karan starts 10 metres behind the starting line in a second 100 metre race. They both run at their earlier speeds. Which of the following is true in connection with the second race?

	(a) Karan and Arjun reach the finishing line simultaneously
	(b) Arjun beats Karan by 1 metre
	(c) Arjun beats Karan by 11 metres
	(d) Karan beats Arjun by 1 metre

909. A 300 metre long train crosses a platform in 39 seconds while it crosses a signal pole in 18 seconds. What is the length of the platform?

	(a) 320 m
	(b) 350 m
	(c) 650 m
	(d) Data inadequate

TOTAL

Detailed Solution

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