Question

The length and breadth of a rectangle is 56 and 40cm a well with diameter 14cm and depth 20cm at the center of the field earth is taken out from well is spread evenly all on the reminder field find the height of remaining field

Answer 1

Area of the field= L×B=56×40=2240cm2
Volm of cylinder= πr^2h=3080cm3
Upper area of the circular well= πr^2=154cm2
Remaining area = 2240-154=2086cm2
Required height=3080÷2086=1.47 cm