Subject: General Aptitude · Chapter: Volume and Surface Area · Exam: · Marks: · Difficulty:
A well with 14 m inside diameter is dug 10 m deep. Earth taken out of it has been evenly spread all around it to a width of 21 m to form an embankment. Find the height of the embankment. (L.I.C.A.AO., 2007) 22 3 3
Answer
Answer (as printed):
Explanation
Volume of earth dug out = × 7 × 7 × 10 m = 1540 m . 7 22 22 Area of embankment = × [(28)2 – (7)2 ] = × 35 × 21 m 2 = 2310 m2. 7 7 Volume 1540 2 \ Height of embankment = = m = m. Area 2310 3
Explanation as extracted from the printed page; notation may be imperfect.