Q1. A bus started its journey from Ramgarh and reached Devgarh in 44 min with its average speed of 50 km hr If the average speed of the bus is increased by 5 km hr how much time will it take to cover the same distance

Q2. Two person A B walk from P to Q which are at a distance of 15km at 6kmph and 9kmph respectively B reaches Q and returns immediately and meets A at R find the distance from P to R

Q3. Two persons A and B start from the opposite ends of a 450 km straight track and run to and from between the two ends The speed of the first person is 25 m s and the speed of other is 35 m s They continue their motion for 10 hours How many times did they pass each other

Q4. The cost of fuel running the engine of an army tank is proportional to the square of the speed and Rs 64 per hour for a speed of 16 kmph Other costs amount to Rs 400 per hour The tank has to make a journey of 400 km at a constant speed The most economical speed for this journey is

Q5. If a man walks 20 km at 5 km per hour he will be late by 40 minutes If he walks at 8 km per hour how early from the fixed time will he reach