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Class : Class 8
The correct answer is B. In 4sec the objet increases its speed to 200m/s . Acceleration=(200-0)÷4 = 50m/s^2. S=ut 1/2×at^2. Solve it you'll get 400m. a=acceleration(50), t=time(4), u=initial velocity(0) and s is displacement(consider it distance travelled)
Three glasses P, Q, R having equal amounts of water were taken and equal amount of salt was added to each one of them.
After that, P was cooled, Q was heated and R was left undisturbed.
The liquid in which glass will now taste most salty ?