Neco Model Questions Vol1 2018 Mathematics Question 31

Practice objective / multiple choice question 31 from the 2018 Neco Model Questions Vol1 Mathematics examination.

Neco Model Questions Vol1 2018 Mathematics Objective / Multiple Choice Hard Difficulty
Question 31 NECO_MODEL_QUESTIONS_VOL1 • 2018 • MATHEMATICS • objective

A water tank consists of a right circular cylinder of height \(8\) m surmounted by a right circular cone of height \(6\) m. The total volume of the tank is \(1500\) cubic metres. (a) Find the common radius \(r\) of the cylinder and the cone, giving your answer correct to two decimal places. (b) Determine the total exterior surface area of the tank (excluding the base of the cylinder), giving your answer to the nearest square metre.

Answer Options

A. Radius = 6.45 m; Surface area = 530 m²
B. Radius = 7.23 m; Surface area = 580 m²
Correct Answer C. Radius = 6.91 m; Surface area = 546 m²
D. Radius = 5.84 m; Surface area = 512 m²
Correct Answer
C
Correct Option:
Radius = 6.91 m; Surface area = 546 m²

About This Question

This is Neco Model Questions Vol1 2018 Mathematics Question 31. It is one of the objective questions from the 2018 Neco Model Questions Vol1 Mathematics examination.

Difficulty level: Hard .

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