Question

message "KEEP THE PARK GREEN AND CLEAN" (see Fig. 12.10 ). Vi the sides of the
There is a slide in a park. One of its side walls has been painted in some colour with a
wall are 15 m, 11 m and 6 m, find the area painted in colour.
FORMULA
6 m
11 m -
KEEP THE PARK
GREEN AND CLEAN
15 m
Fig. 12.10​

Answer 1

Correct Question : -

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". If the sides of the wall are 15 m, 11 m and 6 m, Find the area painted in colour.

Solution : -

Given : -

Sides of the wall are 15m , 11m and 6m ..

To Find : -

Area painted in colour ..

Step-by-step Explanation : -

a = 15m

b = 11m

c = 6m

So : -

S = a + b + c/2

15 + 11 + 6/2

32/2 = 16m

Now : -

Area = √s(s - a) (s - b) (s - c)

√16(16 - 15) (16 - 11) (16 - 6)

√16 × 1 × 5 × 10

√2 × 2 × 2 × 2 × 5 × 2 × 5

2 × 2 × 5 = √2

20√2m²

Therefore , Area = 20√2m² ....