Paragraph : A scientist was asked to find the height of the roof of a dome shaped hall. He took a spherical ball of radius 20 cm which he suspend with the string from the roof of dome. The height of the ball above the ground was 5 cm when suspended. He noted the time of 20 oscillations to be 100 s. The height of the roof of the dome from the ground is :

Paragraph : A scientist was asked to find the height of the roof of a

1.	Paragraph : A scientist was asked to find the height of the roof of a dome shaped hall. He took a spherical ball of radius 20 cm which he suspend with the string from the roof of dome. The height of the ball above the ground was 5 cm when suspended. He noted the time of 20 oscillations to be 100 s. The height of the roof of the dome from the ground is :
Answer» 6.19 m 6.39 m 6.59 m 6.0 m. Solution :HEIGHT of roof `=l+` radius of bob `+` DISTANCE of bob from ground. `=6.34+.2+0.5=6.59`m. So correct CHOICE is ( c ).

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