A particle A is projected vertically upwards, from horizontal ground, with a speed of 40 m/s. At the same instant another particle B is projected vertically upward from the top of a tower of height 20 m, with a speed of 20 m/s. When the particle A is moving upwards, the time duration for which it will remains above the particle B, is

A particle A is projected vertically upwards, from horizontal ground,

1.	A particle A is projected vertically upwards, from horizontal ground, with a speed of 40 m/s. At the same instant another particle B is projected vertically upward from the top of a tower of height 20 m, with a speed of 20 m/s. When the particle A is moving upwards, the time duration for which it will remains above the particle B, is
Answer» A particle A is projected vertically upwards, from horizontal ground, with a speed of 40 m/s. At the same instant another particle B is projected vertically upward from the top of a tower of height 20 m, with a speed of 20 m/s. When the particle A is moving upwards, the time duration for which it will remains above the particle B, is

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