Bissoy.com
Doctors Medicines MCQs Q&A

A circular pool is surrounded by a 4m high concrete wall whose area is 60% less than that of the pool. Calculate the longest length of straight dive in the pool.

A circular pool is surrounded by a 4m high concrete wall whose area is 60% less than that of the pool. Calculate the longest length of straight dive in the pool. Correct Answer 40m

Calculations :

Let the radius of the pool = R

∴ The area of the pool = π × R2 

Now, Area of the pool = 2πR × 4 → 8πR = πR2 (1 - 60%) → R = 20m

∴ The longest length of the pool = 40m

Related Questions

A circular swimming pool is surrounded by a concrete wall 4ft wide. If the area of the concrete wall surrounding the pool is 11/25 that of the pool, then the radius of the pool is?
A circular swimming pool is surrounded by a concrete wall 4 ft. wide. If the area of the concrete wall surrounding the pool is $$\frac{{11}}{{25}}$$ that of the pool, then the radius of the pool is :
From the given table, what is the percentage of students scoring 40 or more, but less than 70. Scores Less than 20 Less than 30 Less than 40 Less than 50 Less than 60 Less than 70 Less than 80 No. of Students 12 19 22 31 38 46 50
“What is the different between height and radius of solid cylinder?” Which of the following option is sufficient alone to find the answer? A) A solid cylinder is made by melting a solid sphere. The radius of cylinder is 3 times the radius of a circle whose area is 154 sq.m. Height of cylinder is equal to the height of cone whose volume is 2772 cubic meters. B) Area of a rectangle whose longer side is ¾ times the radius of a solid cylinder, is 168 sq.m and, Volume of solid cylinder is 2772 cubic meters and its height is 18 m. C) A metallic cone of radius 15m and height 35m is melted into the solid cylinder of radius equal to the radius of a circle whose area is equal to the area of rectangle whose sides are in the ratio 4 : 3 respectively. D) The curved surface area of the solid cylinder is 3 time the surface area of a sphere of radius 7m and height of cylinder is equal to the height of a metallic cone whose curved surface area is 308 sq.m. 
From the following table, how many patients were in the age group 40 – 60? Age (years) Less than 10 Less than 20 Less than 30 Less than 40 Less than 50 Less than 60 Less than 70 No. of patients 11 15 22 29 35 45 50
The influence of shape of aggregate in strength and workability of concrete are given below in statements S1, S2, S3 and S4. Which of the statements are correct? S1: Rounded aggregate produces concrete with high workability and low strength. S2: Angular aggregate produces concrete with high workability and low strength. S3: Rounded aggregate produces concrete with low workability and high strength. S4: Angular aggregate produces concrete with low workability and high strength.
Permeability in concrete is studied towards providing for, or guarding against, which of the following features? 1. The penetration by materials in solution may adversely affect the durability of concrete; moreover, aggressive liquids 'attack' the concrete. 2. In the case of reinforced concrete, ingress of moisture and air will result in corrosion of steel leading to an increase in the volume of steel, resulting in cracking and swilling of the concrete cover. 3. The moisture penetration depends on permeability and if the concrete can become saturated with water it is less vulnerable to frost action.
Study the table and answer the question. The table shows the daily income of 50 persons. Income (Rs.) No. of persons less than 200 12 less than 250 26 less than 300 34 less than 350 40 less than 400 50 How many persons earn Rs.250 or more but less than Rs.350 daily?
The table shows the daily income of 50 persons. Study the table and answer the question. Income (Rs.) No. of persons less than 200 12 less than 250 26 less than 300 34 less than 350 40 less than 400 50 What is the ratio of the number of persons earning less than Rs. 200 to the number of persons earning Rs. 300 or more?
During a medical check-up, the heights of 40 students in a class were recorded as shown in the following table. Height (in cm) Less than 175 Less than 170 Less than 165 Less than 160 Less than 155 Less than 150 Number of students 40 35 25 16 8 4   How many students have a height of 165 cm or more?