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Wrong Answers: | |
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Question 1
A boy walks along the three edges of an equilateral triangle at average speeds of 5 km/h, 9 km/h and 9 km/h. What is the average speed along the whole journey?
$7{2/19}$ kmph.
$8{5/9}$ kmph.
$5{11/21}$ kmph.
$9{1/7}$ kmph.
Ans: a
Let the edge of the triangle be L. Total distance travelled = 3L. Time taken = $L/5 + L/9 + L/9$. So overall average speed = ${3L}/{L/5 + L/9 + L/9}$ which simplifies to ${135/19}$, which is same as: $7{2/19}$ km/h.
Question 2
Speeds of A and B are in the ratio 12 : 17. What is the speed of A if B can cover a distance of 34 Km in 1 hour?
Question 3
A car is moving at a speed of 72 kmph. What is the speed in m/s?
Question 4
An aircraft was on a 1360 km journey. Its engine developed a snag so it had to slow down. It's average speed reduced by 5km/h, as a result of which it reached its destination late by 1 hour. What was the actual duration of the journey?
Question 5
Speeds of A and B are in the ratio 7 : 9. What is the ratio of the times that they will take to cover a distance of 100 km?
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This Blog Post/Article "Distance and Time Quiz Set 015" by Parveen (Hoven) is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.
Updated on 2020-02-07. Published on: 2016-05-06