A plane takes 2hour 45minutes to cover the distance between two airports if it travels 20 km/h slower then it takes 3hour Find the speed of the plane .Also find distance between the two airports.
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Answered by
3
Here distance is constant.
so D1 = D2
so S1*T1 = S2*T2
X*(11/4) = (X-20)*3 [2hours 45 min = 11/4 hours]
11X = 12*(X-20)
11X = 12X - 240
X = 240 Km/hr
D = S*T = 240 * (11/4) = 660Kms
so distance between two airports is 660KMs
so D1 = D2
so S1*T1 = S2*T2
X*(11/4) = (X-20)*3 [2hours 45 min = 11/4 hours]
11X = 12*(X-20)
11X = 12X - 240
X = 240 Km/hr
D = S*T = 240 * (11/4) = 660Kms
so distance between two airports is 660KMs
cherry154:
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Answered by
1
thousand kilometre can travel in the
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