Question

A man riding a bicycle covers a distance of 60 km, in the direction of the wind and comes back in 8 hrs.bIf speed of the wind is 10 km/hr, then find the speed of bicycle.

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Answer 1

Step-by-step explanation:

HEY MATE

ANSWER

ANSWERLet speed of bicycle be x

Then, 60 /x+ 10 + 60 /x - 10 =8

60x - 600 + 60x + 600 =8 ( x2 - 100 )

120x = 8x2 - 800

x2 - 15x - 100 =0

x2 - 20x + 5x - 100 =0

( x- 20 ) ( x + 5 )

x=20,−5

x=20,−5Hence, speed of bicycle is 20 km/hr