A truck travels at 90 km/h for thefirst 1 1/2 h. After that it travels

1.	A truck travels at 90 km/h for thefirst 1 1/2 h. After that it travels at70 km/h. Find the time taken bythe truck to travel 310 km(1) 2.5 h(3) 3.5 h(2) 3 h(4) 4 h
Answer» Truck travels 90km/hr for 1 1/2 hours or 3/2 hoursdistance travelled = 90*3/2 = 135 km total distance = 310kmAfter that it travels 70 km/hr. So distance travelled at 70km/hr= 310-135 = 175kmtime = distance/speed = 175/70 = 5/2 hours total time = 3/2 + 5/2 = 8/2 = 4 hours thanks

A truck travels at 90 km/h for thefirst 1 1/2 h. After that it travels at70 km/h. Find the time taken bythe truck to travel 310 km(1) 2.5 h(3) 3.5 h(2) 3 h(4) 4 h

Answer»

Truck travels 90km/hr for 1 1/2 hours or 3/2 hoursdistance travelled = 90*3/2 = 135 km

total distance = 310kmAfter that it travels 70 km/hr. So distance travelled at 70km/hr= 310-135 = 175kmtime = distance/speed = 175/70 = 5/2 hours

total time = 3/2 + 5/2 = 8/2 = 4 hours

thanks