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2/5 of square shaded = 20% of triangle shaded

2/5 of square shaded = 1/5 of triangle shaded

Make Numerator the same

2/5 of square shaded = 2/10 of triangle shaded

2u = 90

1u = 45

Area of Square is 5u = 225

Area of Triangle is 10u = 450

a) Ratio of area of square to area of triangle

225:450

1:2 (Ans)

 

b) Area of Square = 225 cm^2 = 15 cm x 15 cm

Length of Square = 15 cm (Ans)

 

0 Replies 1 Like ✔Accepted Answer

(a)
For square,
unshaded : shaded : total
3 : 2 : 5

shaded : total
90 : 225

For triangle,
unshaded : shaded : total
8 : 2 : 10

shaded : total
90 : 450

area of the square : area of the triangle
225 : 450
1 : 2

(b)
225 = 15 x 15

Ans : (a) 1 : 2 ; (b) 15 cm.

0 Replies 1 Like

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