The Speed of The Truck must be Increased by :
Answer: (3) 12 km/h
A truck can finish a certain journey in 10 hours at a speed of 48 km/h.
Then, the total distance covered by truck = 48 x 10
= 480 km
In a order to cover same distance in 8 hours,
Then, the speed of truck = 480/8
= 60 km/h
Then, the speed of the truck must be increased by = 60 – 48
= 12 km/h
Hence. the answer is (3) 12 km/h.