WB Police PC · Elementary Mathematics
Area, perimeter and volume — polygons, circles.
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Q1 · Mensuration · EASY
A rectangular garden is 24 m long and 18 m wide. What is the cost of fencing it at the rate of Rs 15 per metre?
Q2 · Mensuration · MEDIUM
The area of a circular field is 616 square metres. Find the cost of fencing it at Rs 12 per metre. (Take pi = 22/7)
Q3 · Mensuration · MEDIUM
A room is 8 m long, 6 m wide and 4 m high. What is the total cost of whitewashing the four walls and the ceiling at Rs 25 per square metre?
Q4 · Mensuration · HARD
A metallic sphere of radius 6 cm is melted and recast into a cylinder of radius 3 cm. What is the height of the cylinder? (Use pi = 22/7)
Q5 · Mensuration · HARD
The area of a rectangular field is 1,200 sq. m and its perimeter is 140 m. What is the length of the field if it is greater than the breadth?