InfyTQ Time and Distance Quiz 4

Solution: We know, Distance = Speed × Time

3hr 45 min = 15/4 hrs

Distance covered = 5*15/4 = 18.75 km = 19 (approx.)

New Speed =15 km/hr

Time taken = Distance /Speed = 19/15 = 1.2 hrs

Solution: We know, Speed = Distance /Time

Ajay’s speed =800/3x60 = 4.44 m/sec

Solution: Prior speed of the ship

= 2000/(60*(24-4))km/h

= 5/3 km/h

New speed = 5/3 * 5/2 km/h = 25/6 km/h

Per day the ship sails for (24-8)= 16 hours

Each day the ship covers = 5*16 Kms = 80 kms

The total time taken for covering 1250 Kms = 1250/80 = 15.62 days

Solution: Let each side of the four-sided path= a km,

Average speed of Raj = b km/h

so, a/15 + a/10 + a/11 + a/12 =4a/b

225a/660 = 4a/b b = 4a*660/225            = 11.7 km/h

Solution: We know, Time = Distance/Speed

Time is taken by Kunal in the first half = 8/7

Time is taken by Kunal in the second half = 8/3

Total time taken to reach home = {(8/7) + (8/3)} = 80/21

Total Time taken = (80/21)*60 = 228.5 minutes

Solution: Total distance = 120 km

We know, Time= Distance/Speed

Raghav covers the total distance in two different speeds = 40 km/hr & 30 km/hr

Time taken to cover 50 km = 50/40 = 1.25 hours

Time taken to cover 70 km = 70/30 = 2.33 hours

Total time taken = 3.58 hours

Average Speed for the entire trip = 120/3.58 = 33.51 km/hr

Solution: Total distance = 120 km

We know, Time= Distance/Speed

Raghav covers the total distance in two different speeds = 40 km/hr & 30 km/hr

Time taken to cover 50 km = 50/40 = 1.25 hours

Time taken to cover 70 km = 70/30 = 2.33 hours

Total time taken = 3.58 hours

Average Speed for the entire trip = 120/3.58 = 33.51 km/hr

Solution: Total Distance = 250km/hr

Total time is taken when the average speed is 80 km/hr = 3 hours

Total time is taken when the average speed is 60 km/hr

We know, Time = Distance/Speed

Time = 250/60 = 4.16 hours

Solution: The speed of the first train = 6x

Speed of the second train = 7x

According to the question,