Fewpal
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There is a slide in a park. One of its side walls has been painted in some colour with a message “KEEP THE PARK GREEN AND CLEAN” (see Fig.). If the sides of the wall are 15 m, 11 m and 6 m, find the area painted in colour.

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Here a = 15 m, b = 11 m, c = 6 m 

∴ s = a + b + c/ 2 = 15 + 11 + 6/ 2 m = 16 m

Area of the triangle

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