Subject: General Aptitude · Chapter: Volume and Surface Area · Exam: · Marks: · Difficulty:
Rahul hired a contractor to dig a well of 10 metres length, 10 metres breadth and 10 metres depth for ₹ 40000. However, when the contractor was about to start the work, he changed his mind and asked him to get two wells dug, each with a length of 5 metres, breadth of 5 metres and depth of 5 metres. How much should Rahul pay to the contractor?
(a)₹ 10000
(b)₹ 20000
(c)₹ 40000
(d)None of these
Answer
Answer (as printed): A
Explanation
Clearly, payment shall be made in proportion to the volume of earth dug.$$\frac{\text { Volume actually dug }}{\text { Volume to be dug as settled }}=\frac{2 \times(5 \times 5 \times 5)}{10 \times 10 \times 10}=\frac{1}{4} .$$ ∴ Payment to be made $=\frac{1}{4} \times 40000=10000$.
Explanation as extracted from the printed page; notation may be imperfect.