Search questions

A car covers three equal distances at speeds of 60 km/h, 90 km/h and 180 km/h respectively. What is the average speed of the car for the entire journey?

The average score of a batsman in 4 innings is 60 runs. If the difference between his highest and lowest score is 40 runs and the other two scores are 55 and 65 , find the highest score.

If average of $3x,2x+2,3x+2$, is 20 , find $x$.

5 numbers are in arithmetic progression. The sum of the first and the last number of this progression is 80.What is the average of these five numbers?

A car covers four successive 8 km distances at speeds of $12\mathrm{km}/\mathrm{hr},18$ km/hr, 24 km/hr and 36 km/hr, respectively. Its average speed (in $\mathrm{km}/\mathrm{hr}$ ) over this distance is:

Find the average speed of Sanjay, who covers the first 150 km in 4 hours and the next 250 km in another 4 hours.

An aeroplane travels distances $1320\mathrm{km},1760\mathrm{km}$ and 2095 km at the rate of $528\mathrm{km}/h,352\mathrm{km}/h$ and 419 $\mathrm{km}/h$, respectively. Find the average speed (in km/h) of the aeroplane.

A car travels four consecutive distances of 2 km each at speeds of 10 km/hr, 20 km/hr, 30 km/hr, and 40 km/hr, respectively. What is the average speed of the car (in $\mathrm{km}/\mathrm{hr}$ ) over this total distance?

A refinery produces 3 grades of gasoline: Regular (85% octane), Mid-grade (90% octane), and Premium (95% octane). If 200 barrels of Regular, 100 barrels of Mid-grade, and 100 barrels of Premium are mixed, what is the average octane rating ?

A man goes to Jaipur from Surat at a speed of 20km/hr and returns to Surat at speed of $30\mathrm{km}/\mathrm{hr}$, through same route. What is his average speed (in km/hr) of the entire journey?

Suman covers a certain distance by car, driving at 22 km/hr, and he returns to the starting point, riding on a scooter at a speed of 17 km/hr. Find the average speed for the whole journey.

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