7. How many cubic meters of earth must be dugout to siany cubic meters of earth must be dugout to sink a well 22.5 m deep & of diameter 7nmAlso, find the cowith diameter 20cm has water to a height of9 cmst of plastering the inner curved surface at Rs 3 per squaremeter. A glass cylindervolume of a metallic cylinder pipe is 748 cm3. It length is 14cm & its external radius is 9cm.Find its thickness

7. How many cubic meters of earth must be dugout to siany cubic meters

1.	7. How many cubic meters of earth must be dugout to siany cubic meters of earth must be dugout to sink a well 22.5 m deep & of diameter 7nmAlso, find the cowith diameter 20cm has water to a height of9 cmst of plastering the inner curved surface at Rs 3 per squaremeter. A glass cylindervolume of a metallic cylinder pipe is 748 cm3. It length is 14cm & its external radius is 9cm.Find its thickness
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