If 9x2 + 16y2 = 24xy, then find the ratio of ‘x’ and ‘y’, respectively.
9x2 + 16y2 = 24xy Or, 9x2 + 16y2 – 24xy = 0 Or, (3x)2 + (4y)2 – 2 × 3x × 4y = 0 [(a – b)2 = a2 + b2 – 2ab] Or, (3x – 4y)2 = 0 Or, 3x – 4y = 0 Or, 3x = 4y So, x/y = 4/3 Or, x:y = 4:3
The average speed of a car, a bus and a train together is 117 km/hr. andn ratio of their speed is 2 :4: 7. What is the average speed of a train and the ...
How much time a train 120 metres long running at the speed of 36 km/hr will take to cross a bridge 130 metres in length?
Speed of a car and a bus is 30 km/h and 6 km/h, respectively. If the time taken by the car to cover a distance of ‘10x’ km is 2 hour less than time ...
A and B are travelling towards each other with a speed of 10 km/hr and 20 km/hr. They started at same time and A covered 15 km less distance than B befo...
A train is travelling at the rate of 45 km/hr. How many seconds it will take to cover a distance of 5/8 km?
The speed of a car is 15% more than that of a bike. Both of them start from a same point. After travelling for 8 hours, the speed of the bike is increas...
A train has to cover a distance of 135 km in 15 hours. If it covers half journey in 3/5th time, then the speed of covering the remaining dist...
A and B are travelling towards each other with a speed of 20 km/hr and 30 km/hr. They started at same time and A covered 30 km less distance than B befo...
I walk a certain distance and ride back taking a total time of 37 minutes. I could walk both ways in 55 minutes. How long would it take me to ride both ...
Two trains X and Y start at the same time in the opposite direction from two points P and Q and arrive at their destinations 25 and 16 hours respectivel...