Question

the area of right angle triangle is 30 sq.m . it's length is 80m then find its breadth​

Answer 1

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We know that,

Area of a ∆ = ½ × base × height

=> 30 = ½ × 80 × height

=> 30 = 40 × height

=> 30/40 = height

=> height = ¾ metres

Note :

height = breadth

length = base

Answer 2

Letthebreadth=$\huge{\underline{\underline{\sf{\red{x\:cm}}}}}$

length=$\huge{\underline{\underline{\sf{\pink{x\:+\:10}}}}}$

Perimeter=$\huge{\underline{\underline{\sf{\pink{80\:cm}}}}}$

2(l+b)=80m

l+b=40

x+10+x=40

x=15cm

then,length=15+10=25

l=25cm

Dimension(l,b)=(25cm,15cm)

area=l×b

=25×15

=375cm²