Question

Rawal Express takes 4 and a half hour at a speed of 80 km / h to go from Rawalpindi to
Lahore. How fast must the train travel to complete the same journey in 3 and a half hour?​

Answer 1

Step-by-step explanation:

we know that,

speed = distance /time

Rawal express takes 4 and half hour at the speed of 80 km/hr

therefore,

distance travelled by rawal express is ,

Distance = 80 km/hr × 9/2 hr

Distance = 360 km

If the same train wants to complete the journey of 360 KMS in 7/2 hrs , the speed will be

distance / time = speed

360 /7/2 = speed

Speed = 102.85 km /hr