A 5-m-deep cylindrical pit having a radius of 1.4 m is dug in a field. – McqOptions

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1.	A 5-m-deep cylindrical pit having a radius of 1.4 m is dug in a field. The earth so dug out is used to raise a platform of 10 m × 8 m. What is the height of the platform (in cm)?\(\left( {\text{Use}\,\pi = \frac{{22}}{7}} \right)\)
A.	38.5
B.	7.7
C.	137.5
D.	30
Answer» B. 7.7

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