S Purkayastha Solutions for Chapter: Perimeter and Area, Exercise 5: Check Point

The inner circumference of a circular track is $220\text{ m}$. The track is $7 \text{m}$ wide everywhere. Calculate the cost of putting fence along the outer circle at the rate of $₹2$ per metre.

The radius of a wheel of a vehicle is $42 \text{cm}$. How many revolutions will it complete in a journey of $19.8\text{ km}$?

The wheel of a car makes $2500$ revolutions in covering a distance of $4.95\text{ km}$. Find the diameter of the wheel.

A boy is cycling in such a way that the wheels of his bicycle are making $140$ revolutions per minute. If the diameter of the wheel is $60 \text{cm}$, calculate the speed in km per hour at which the boy is cycling.

The radius of circular pipe is $10 \text{cm}$. What length of tape is required to wrap it once around the pipe?

Find the perimeter of given figure.

Sania wants to put a lace on the edge of a circular table cover of diameter $1.5 \text{m}$. Find the length of the lace required and also find its cost, if $1$ metre of the lace costs $₹15.$

[ Use $\mathrm{\pi }=3.14$] 

Pragya wrapped a cord around a circular pipe of radius $4 \text{cm}$ and cut off the length of the required cord. Then she wrapped it around a square box of side $4\text{ cm}.$ Did she have any cord left?