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Given that, x + y = 2 and 1/x + 1/y = 18/15 Using, 1/x + 1/y = 18/15 (x + y)/xy = 18/15 2/xy = 18/15 Therefore, xy = 15/9 Now, by using formula x3 + y3 = (x + y) [(x + y)2 – 3xy] = 2 (4 – 3 × 15/9) = 2 (4 – 5) = -2
The speed of ‘A’ and ‘B’ is 60 km/hr and 30 km/hr, respectively. If the distance covered by ‘A’ in ‘x’ h...
A superbike takes 84 minutes to cover 112 km. If the speed of the superbike is decreased by 20 km/h, then find the time taken by the superbike to cover ...
A train would take 20 seconds to cross a stationary pole. If the train was 200m shorter, it would have taken 10 seconds less. Find the speed of the train.
A bike moving at a speed of 240 km/h takes 5 hours to reach the fuel station. If the target must be reached within 80 minutes, at...
The diameter of a wheel W is 63 cm. It completes 1000 rotations in 1 minute. Find the speed of the vehicle.
A man travels a specific distance at a given speed, completing the journey in a set amount of time. If he had reduced his speed by 10 km/h, it would hav...
Travelling at his usual speed, a man reaches his destination in 12 hours. If he reduces his speed by (1/6), then he covers 72 km less in the same time. ...
A car travels a distance of 200 km at the speed of 40 kmph. If it covers the next 120 km of its journey at the speed of 60 kmph and last 60 km of its jo...
A and B are travelling towards each other with a speed of 15 km/hr and 30 km/hr. If they started at same time and A covered 25 km less distance than B b...
In a 1500-metre race, 'Sahil' beats 'Rohan' by '300' metres and 'Kabir' by '450' metres. If 'Rohan' and 'Kabir' participate in a 700-metre race, and 'Ka...
