1.

Initially the diameterof a balloon is 28 cm. It can explode when the diameterbecomes 5/2 times of the initial diameter . Air is brown at 156 cc/s. It is known that the shape of balloon always remains spherical . In how many seconds the balloon will explode ?

Answer»

A)`1078 s`
B)`1368 s `
C)`1087 s`
D)none of these

ANSWER :A


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