Question

the length of the triangle is 3m more than 5 times its breadth find the area of the rectangle if its perimeter is 90m
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Answer 1

Step-by-step explanation:

I hope that it is rectangle not triangle

length be l

breath be b

According to question,

l = 5b+3

perimeter of rectangle = 2(l+b)

= 2(5b+3+b)

= 2(6b+3)

= 12b+6

90= 12b+6

90-6=12b

84=12b

84÷12= b

7=b

l=5×7+3

= 38

area of rectangle=l×b

=38×7

=266

hope it helps