Question
The average weight of 4 persons is 50 kg. The heaviest
person’s weight is 20 kg more than the lightest person’s weight. If the average weight of the rest two persons is 50 kg, then find the weight of the heaviest person.Solution
The sum of the weight of 4 persons = 50 × 4 = 200 kg Let the weight of the lightest person = ‘x’ kg The weight of the heaviest person = (x + 20) kg The sum of the weight of the remaining two persons = 50 × 2 = 100 kg According to the question, x + x + 20 + 100 = 200 2x = 80 x = 40 The weight of the heaviest person = 40 + 20 = 60 kg
Which instrument is primarily used to measure the relative density of liquids by utilizing the principle of buoyancy?
What term refers to the superposition of two or more coherent waves to produce regions of maxima and minima?
Which of the following rays are not deflected by a magnetic field?
The term ‘Isoneph' indicates the lines of equal –
The speed of a fast moving electron, having total energy of 2 MeV, is nearly:
A brass boiler has a base area of 0.2 m2 and thickness 1.0 cm. It boils water at the rate of 6.0 kg/min when placed on a stove. Calculate th...
Which of the following is the principle behind the working of a hydraulic press? Â
Which of the following statements is true about energy bands in solids?
A uniform wire is bent into a circle and a battery is connected across a chord that subtends an angle of 60° at the center. What is the ratio of curren...
A 10 μF capacitor is charged to 50 V and then connected across an uncharged 20 μF capacitor. What is the final potential difference across both capac...
Relevant for Exams:
