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2021 WAEC Mathematics Theory A man left town am at 10:00 AM and traveled by car to town N at...

Mathematics
WAEC 2021

A man left town am at 10:00 AM and traveled by car to town N at an average speed of 72 km/h.

He spent 2hours for a meeting and returned through town M by bus at an average speed of 40KM/H. 

If the distance covered by the bus was 2km longer than that of the car and he arrived at town M at 1 :55PM.

calculate distance from M to N.

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Explanation

Time spent traveling = 3 hours 55 minutes - 2 hours

= 1hr 55mins

Let x be the distance from M - N

and t , time spent from M - N 

Then t = x / 72

Return time = (23 / 12) - t

(23 / 12) - t = (x + 2) / 40

(23 / 12) - ( x / 72) =  (x + 2) / 40

\(\frac{138 - x}{9}\) = \(\frac{x + 2}{5}\)

690 - 5x = 9x + 18

14x = 672

x = 48km


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WAEC May/June 2024 - Practice for Objective & Theory - From 1988 till date, download app now - 99995
WAEC offline past questions - with all answers and explanations in one app - Download for free
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