Number of Questions:
10
level of difficulty:
Moderate 1) Walking at 3/4 of his normal speed , a man takes 2(1/2) hours more than the normal time . Find the normal time ? a) 7.5 hrs b) 6 hrs c) 8 hrs d)12 hrs 2) The Sinhagad Express left Pune at noon sharp . 2 hrs later the Deccan Queen started from Pune from the same direction . The Deccan Queen overtook the Sinhagad Express at 8 pm . Find the average speed of the 2 trains over this journey if the sum of their average speed is 70 km/hr ?
3) Sambhu beats Kalu by 30 metres or 10 seconds . How much time was taken by Sambhu to complete a race of 1200 meters ? 4) Without stoppage , a train travels a certain distance with an average speed of 60 km/hr , and with stoppage , it covers the same distance with an average speed of 40 km/hr . On an average , how many mins per hr does the train stop during the journey ? 5 ) Rajdhani travels 650 km in 5 hrs & another 940 km in 10 hrs . What is the average spped of the train ? 6) Rishi , during his journey , travels for 20 mins at a speed of 30 km/hr , another 30 mins at a speed of 50 km/hr , and 1 hr at a speed of 50 km/hr and 1 hr at a speed of 60 km/hr . What is the average velocity ? 7) Jayshree goes to office at a speed of 6 km/hr and returns to her home at a speed of 4 km/hr . If she takes 10 hrs in all , what is the distance between her office and home ? 8) A motor car does a journey in 17.5 hrs , covering the first half at 30 km/hr and the second half at 40 km/hr . Find the distance of the journey ? 9) Sujit covers a distance in 40 mins if he drives at a speed uf 60 km/hr on an average . Find the speed at which he must drive at to reduce the time of the journey by 25% ?
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1. a) 7.5hrs 2. Sinhagad Express = 30km/hr and Deccan Queen = 40km/hr 4. Stops for 30min per hr 5. 106km/hr 6. 51.18km/hr 7. 24km 8. 600km 9. 80km/hr 10.12km
390 sec
20 Min per Hr
Whenever we say that A has beaten B by 10 secs, it is with respect to whose speed ?
A or B ?
I got the answer 390 secs by assuming that B took 10 secs to cover 30 meters.
The answer would be 400 secs if it is assumed that A took 10 secs to cover 30 meters.solut
What is the solution for 4.
The train stops for 20 mins. per hour.
n/a
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