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1) The ratio of t - r to r is 0.15 and t - r is equal to 0.3 foot
2) The area of the concrete in the cross section is 1.29π square feet
The OA is A
Source: GMAT Paper Tests
The figure above shows the circular cross section of a concrete water pipe. If the inside radius of the pipe is r feet and the outside radius of the pipe is t feet, what is the value of r ?
1) The ratio of t - r to r is 0.15 and t - r is equal to 0.3 foot
2) The area of the concrete in the cross section is 1.29π square feet
The OA is A
Source: GMAT Paper Tests
