A student pilot was required to fly to an airport and the...
A student pilot was required to fly to an airport and then return as part of his flight training. The average speed to the airport was 120 km/h, and the average speed returning was 150 km/h. If the total flight time was 3 hours, calculate the distance between the two airports.
270 km
200 km
360 km
450 km
Correct answer is B
Speed = \(\frac{Distance}{Time}\)
⇒ Time = \(\frac{Distance}{Time}\)
Let D = distance between the two airports
∴ Time taken to get to the airport = \(\frac{D}{120}\) and Time taken to return =\( \frac{D}{150}\)
Since total time of flight= 3hours,
⇒ \(\frac{D}{120} + \frac{D}{150}\) = 3
⇒ \(\frac{15D + 12D}{1800}\) = 3
⇒ \(\frac{27D}{1800}\) = 3
⇒ \(\frac{3D}{200} = \frac{3}{1}\)
⇒ 3D = 200 x 3
∴ D =\(\frac{ 200\times3}{3}\)= 200km
Simplify 3 \(^{n − 1}\) × \(\frac{27^{n + 1}}{81^n}\)...
If r varies inversely as the square root of s and t, how does s vary with r and t? ...
The diagonals of a rhombus are 16 cm and 12 cm find the length of the side. ...
Bello buys an old bicycle for ₦9,200.00 and spends ₦1,500.00 on its repairs. If he sells the bic...
From the diagram, find the bearing of Q from P....
Find the mean of the numbers 1, 3, 4, 8, 8, 4 and 7 ...
For what value(s) of x is the expression (x2 + 15x + 50) ÷ (x - 5) not defined...