Question
A rectangular room measures 25 metres in length and has
a perimeter of 78 metres. Calculate the total cost to carpet this room at a rate of Rs. 8 per square metre.Solution
Let the breadth of the floor = 'b' metres Then, perimeter of the floor = 2 x (25 + b) = 78 So, b = (78/2) - 25 = 14 So, area of the floor = 25 x 14 = 350 m2 So, cost of carpeting the floor = 350 x 8 = Rs. 2800 Hence, option a.
The total surface area of a cylinder of diameter 10 cm is 330 square centimeters. Find the height of the cylinder.
A cone has a radius of 6 cm and a slant height of 10 cm. What is the approximately surface area of the cone?
The sum of the perimeters of a square and a rectangle is 120 metres. If the sum of the length and breadth of the rectangle is 28 cm, then find the area ...
Area of a rectangle is equal to the total surface area of a hemisphere having volume 5488 cm³ . Find the perimeter of the rectangle if its length is 12...
A tank whose length, width and height are 20 metres, 18 metres and 10 metres respectively is completely filled with juice. If the juice costs Rs.4/m
Find the circumference and area of a circle of radius 7 cm. Take π = 22/7.
What is the difference between (in m2) the area of a circular field of radius 35 metres and area of a rectangular piece of land having its di...
If a triangle with base 6 cm has the same area as a circle with radius 6 cm, then the corresponding altitude (in cm) of the triangle is:Â
The length, breadth and height of a storeroom are 12m, 9m and 10m respectively. If each box occupies 60 m3 of space, then how many boxes can ...
If the circumference of a circle is 308 cm then find the area of the circle?
Relevant for Exams:
