a bus travelled the first half of its route
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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
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
it is a formula
if distance is equal
then
average speed=
=2x v1×v2/v1+v2
ok...thank you
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