Management Aptitude Test 2015 Paper

(c) ∵ Total distance of journey = 300 km
Since, half of the distance, he covers with the speed of60 km/h.
∴ Time taken = $\frac{150}{60}=\frac{15}{6}=\frac{5}{2}$ = 2.5h
Again, he travels for 30 min with the speed of 50 km/h.
∴ Distance = 50 x $\frac{1}{2}$ = 25 km
Remaining = 300 - (150 + 25)
= (300 - 175) = 125 km
Distance and time = [4.5 - (2.5 + 0.5)]
= 4.5 - 3 = 1.5 h
∴ Required speed = $\frac{\mathrm{Distance}}{\mathrm{Time}}$
= $\frac{125}{1.5}=\frac{250}{3}$ km/h