An aeroplane covers a certain distance at a speed of 240 kmph in 5 hours. To cover the same distance in $ 1\dfrac{2}{3} $ hours, it must travel at a speed of:
300 kmph
360 kmph
600 kmph
720 kmph
Explanation:
Distance = (240 x 5) = 1200 km.
Speed = Distance/Time
Speed = 1200/(5/3) km/hr. [We can write $ 1\dfrac{2}{3} $ hours as 5/3 hours]
Required speed =$\left(1200 \times \dfrac{3}{5}\right) $km/hr
= 720 km/hr.
Distance = (240 x 5) = 1200 km.
Speed = Distance/Time
Speed = 1200/(5/3) km/hr. [We can write $ 1\dfrac{2}{3} $ hours as 5/3 hours]
Required speed =$\left(1200 \times \dfrac{3}{5}\right) $km/hr
= 720 km/hr.