A rectangular field 30 m long and 20 m broad. How much deep it should be dug so that from the earth taken out, a platform can be formed which is 8 m long, 5.5 m broad and 1.5 m high where as the earth taken out is increase by 10/5? Choose the correct choice from the following choices
A) 12 cm
B) 10 cm
C) 83 cm
D) 20 cm
E) 30 cm
30 * 20 * x   = (8 * 5.5 * 1.5)/2=10   Answer:10 cm
<result>B</result>
A rectangular field 30 m long and 20 m broad. How much deep it should be dug so that from the earth taken out, a platform can be formed which is 8 m long, 5.5 m broad and 1.5 m high where as the earth taken out is increase by 10/5?