Math, asked by bappa12, 1 year ago

a bus travelled the first half of its route

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Answered by sk0768173gmailcom

1

let the average speed for second half be x then
2×20×x/(x+20) =24
40x=24x+20×24
40x-24x=20×24
16x=24×20
x=6×5=30 km/h Ans

bappa12: plz explain

sk0768173gmailcom: it is a formula

sk0768173gmailcom: if distance is equal

sk0768173gmailcom: then

sk0768173gmailcom: average speed=

sk0768173gmailcom: =2x v1×v2/v1+v2

bappa12: ok...thank you

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