Question

The speed of a bus is 54 km/h if we don’t let it stop at any point. If the bus stops at the bus-stops, the speed of the bus is 45 km/h. What is the time that the bus stops for per hour?
A) 7 min B) 10 min C) 21 min D) 22 min​

Answer 1

Answer:

(c) 21 min

Explanation:

The purpose of our lives is to be happy.” — Dalai Lama.

“ Life is what happens when you're busy making other plans.” — John Lennon.

“ Get busy living or get busy dying.” — Stephen King.

“ You only live once, but if you do it right, once is enough.” — Mae West.

Answer 2

$\star\underline\mathtt\orange{Question:}$

The speed of a bus is 54 km/h if we don’t let it stop at any point. If the bus stops at the bus-stops, the speed of the bus is 45 km/h. What is the time that the bus stops for per hour?

$\star\underline\mathtt\purple{Answer:}$

Given values:

$\sf{Distance=Speed×Time}$

Speed of the bus given= $\sf{54\:km/hr}$

And the time covered by it=$\sf{1\:hr.}$

The relation between distance-speed abd the time is,

$\sf{↪Speed=}\dfrac{Distance}{Time}$

If we let the bus stop,then it will cover Distance $\sf{=45\:km/hr.}$

Thus ,due to this stoppages the bus covered $\sf{9\:km\:lesser.}$

Time taken to cover $\sf{9\:km }$

$\sf{=}\dfrac{Distance}{Speed }=\dfrac{9}{54}h$

$\sf{ =}\dfrac{9}{54}×{60}=10min.$

Hence,the correct ans. is Option B i.e. $\sf{10\:min.}$

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