Chapter 11 – Perimeter and Area
Assignment 2
Q.1. Amar rolls a wheel along a straight-line AB. The distance of AB is 19.8 m and the wheel makes 15 rotations. What is the radius of the wheel, in cm? ( π = 22/7 )
Q.2. What is the ratio of the heights of two triangles which have equal base side and their areas are in the ratio 9 : 16?
Q.3. A circular table cloth encloses a beautiful design as shown in the figure. If the inner circumference is 396 cm and width of the design is 7 cm. Find the radius of the cloth.
Q.4. The diameter of a circular park is 66 metres. On its outside, there is a 4 m wide path, running around it. Find the cost of turfing the path at ₹ 2.50 per square metre.
Q.5. Four horses are tethered with ropes of same length at four corners of a square plot of side 14 m so that the adjacent horses can just reach one another. Find the ungrazed area.
Q.6. ABCD is a rectangle and PQ ^ BC. Find the area of shaded portion in the figure given below.
Q.7. The two adjacent sides of a parallelogram are 5 cm and 4 cm respectively and if the altitude is 2 cm corresponding to the side 5 cm, then find the length of altitude corresponding to the side 4 cm.
Q.8. The circumference of a circle exceeds its diameter by 18 cm. Find the radius of the circle.
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