Question

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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. 11.10). If
the sides of the wall are 15 m, 11 m and 6 m, find the area painted in colour.
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Answer 1

Answer:

s=11+15+6/2=16

a=15

b=11

c=6

by herons formula,

√16(16-15)(16-11)(16-6)=8√10

therefore area of painted colur is 8√10m²