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Total work = 40 × 30 = 1200 units Work completed by 20 tailors in 15 days = 20 × 15 = 300 units Remaining work = 1200 – 300 = 900 units Let the number of tailors added be ‘u’. Therefore, (20 + u) × 15 = 900 300 + 15u = 900 15u = 600 u = 40 Number of tailors added = 40
The surface tension of water on adding detergent to it –
The device which transfer the signal from low resistance region to high resistance region is –
A car increases its speed from 20 m/s to 60 m/s in 8 seconds. Find its acceleration.
Cryogenics is a branch of Physics that deals with what?
When a passenger in a moving bus is suddenly thrown forward when the bus stops, this is explained by:
A bullet of mass 10 g is fired with a velocity of 500 m/s. Find its momentum.
Which of the following is a characteristic of a conductor?
Which of the following is a characteristic of sound waves?
The distance between the focus and the centre of curvature of a spherical mirror in terms of the radius of curvature R, is equal to:
The time period of a second’s pendulum is –
