10th Class Mathematics Solved Paper - Mathematics-2016 Outside Delhi Set-I

  • question_answer 14)
    In fig. 6, find the area of the shaded region, enclosed between two concentric circles of radii 7 cm and 14 cm where\[\angle AOC=40{}^\circ \]. (Use \[\pi =\frac{22}{7}\])

    Answer:

    Given, \[r=7\text{ }cm\] and \[R=14\text{ }cm\] .
    Area of shaded region \[=\pi ({{R}^{2}}-{{r}^{2}})\frac{\theta }{360{}^\circ }\]
                                        \[=\frac{22}{7}({{14}^{2}}-{{7}^{2}})\times \frac{(360{}^\circ -40{}^\circ )}{360{}^\circ }\]
                                        \[=\frac{22}{7}\times 7\times 21\times \frac{320{}^\circ }{360{}^\circ }\]
                                        \[=410.67\,\,c{{m}^{2}}\]


adversite



LIMITED OFFER HURRY UP! OFFER AVAILABLE ON ALL MATERIAL TILL TODAY ONLY!

You need to login to perform this action.
You will be redirected in 3 sec spinner

Free
Videos