Area of the roti for your cousin is one-fourth the roti for you- What can you say about the ratio of radius of your cousin-s roti - radius of your roti - -3 MARKS-

Area = πr^2 area of your cousin's roti/area of your roti = 1/4 If r_1 is the radius of your cousin's roti and r_2 is the radius of your roti πr_1^2/πr_2^2 = ...

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Standard VII

Physics

Speed (Average Speed)

Area of the r...

Question

Area of the roti for your cousin is one-fourth the roti for you. What can you say about the ratio of $\frac{radius of your cousin's roti}{radius of your roti}$ ? [3 MARKS]

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Solution

Area = $π r^{2}$

$\frac{area of your cousin's roti}{area of your roti} = \frac{1}{4}$

If $r_{1}$ is the radius of your cousin's roti and $r_{2}$ is the radius of your roti

$\frac{π {r_{1}}^{2}}{π {r_{2}}^{2}} = \frac{1}{4}$

Hence $\frac{r_{1}}{r_{2}} = \frac{1}{2}$

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Area of the roti for your cousin is one-fourth the roti for you. What can you say about the ratio of radius of your cousin's rotiradius of your roti? [3 MARKS]

Area = πr2 area of your cousin's rotiarea of your roti=14 If r1 is the radius of your cousin's roti and r2 is the radius of your roti πr12πr22=14 Hence r1r2=12

Area of the roti for your cousin is one-fourth the roti for you. What can you say about the ratio of $\frac{radius of your cousin's roti}{radius of your roti}$ ? [3 MARKS]

Area = $π r^{2}$

$\frac{area of your cousin's roti}{area of your roti} = \frac{1}{4}$

If $r_{1}$ is the radius of your cousin's roti and $r_{2}$ is the radius of your roti

$\frac{π {r_{1}}^{2}}{π {r_{2}}^{2}} = \frac{1}{4}$

Hence $\frac{r_{1}}{r_{2}} = \frac{1}{2}$