Time and Distance Practice Test 1 with solutions

Question : 6 of 40

Marks: +1, -0

A and B who are 530 km apart, starts moving towards each other at a speed of 55 km/hr and 25 km/hr respectively. A starts his journey an hour before B. How long will they take to cross each other?

Less than 19 hours
Less than 17 hours
Less than 22 hours
More than 20 hours
More than 21 hours

Validate

Solution:

Let they meet after x hours. So A travel for x hours and B travels for (x - 1) hours.
55x + 25(x - 1) = 530
55x + 25x - 25 = 530
80x = 505

x = 505/80 = 6.312

Time = 6 hours 31 min

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