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 answers.
A) 77 cm
B) 10 cm
C) 55 cm
D) 33 cm
E) 11 cm
30 * 20 * x   = (8 * 5.5 * 1.5)/2   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?