Question
Meena has 72 marbles of two colours β green and
yellow. If she buys 24 more green marbles, the ratio of green to yellow marbles becomes 5:3. Find the number of green marbles Meena initially had.Solution
Let the number of green and yellow marbles with Meena after buying 24 more marbles be '5x' and '3x' respectively.Β ATQ: 5x + 3x = 72 + 24 8x = 96 x = 12 Number of green marbles after buying = 5x = 5 Γ 12 = 60 Number of green marbles Meena initially had = 60 β 24 = 36
Where is the magnetic force of a bar magnet the strongest?
Which law describes the relationship between the force applied to a spring and its extension or compression?
What is the SI unit of power?
A circular coil of wire consisting of 120 turns, each of radius 12 cm carries a current of 0.30 A. What is the magnitude of the magnetic field B at the ...
A container is filled with two immiscible liquids of densities Οβ = 1000 kg/mΒ³ (height 0.3 m) and Οβ = 800 kg/mΒ³ (height 0.2m) stacked above eac...
Water flows through a horizontal pipe at a constant volumetric rate. At a location where the cross sectional area decreases, the velocity of the fluid:
The surface tension of water on adding detergent to it β
Which law explains the relation between pressure and volume of a gas at constant temperature?Β Β
Which of the following optical phenomena CANNOT convert unpolarised light to plane polarised light?
A sugar solution in a tube of length 2.0 dm produces optical rotation of 12Β°. Then, the sugar solution is diluted to one half of its initial concentra...