Question

anyone tell me about these question plzz about these que no..b one fast

Answer 1

570 km/hr
If Actual speed=x & Wind speed=30 km/hr
Given 3600/(x+30)+(2/3)=3600/(x-30)
(10800+60+2x)/3(30+x)=3600/(x-30)
x^2=324900 or x=570

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