Question

Ananda leaves her house at 8:30am for his school .the school is 2km away and classes start at 9:00am . if he walks at a speed of 3km/h for the First kilometer .at what speed should he walks the second kilometer to reach just in time.​

Answer 1

Answer:

$\sf distance = 2 \: km$

$\sf total \: time = 30 \: minutes = 0.5 \: hourintial$

speed is equal to 3 kilometres per hour for the first hour hence time taken

$\sf = \frac{distance}{speed} = \frac{1}{3} \: hour$

$\sf time \: left = 0.5 - \frac{1}{3} = \frac{0.5}{3}$

$\sf distance \: left = 1 \: km$

hence speed at which he should walk second km would be

$\sf \frac{1}{(0.5/3)} = 6 \: km \: per \: hour$

Answer 2

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