a rectangle has 15 cm as its length and 150 cm sq. as its area its area is increased to 4/5 times the original area by increasing only its length.find the new perimeter
Answers
Answered by
9
Answer:
breadth = 10
length = 15
perimeter = 50cm
new length = 27cm
new perimeter = 74
Step-by-step explanation:
length of rectangle = 15
breadth = x
area = 150
l×b = 150
15 × b = 150
b = 150/15
b = 10
area is increased by 4/5 times
= 150 + (4/5 × 150)
= 150 + 120
= 270
new area is 270 sq cm
breadth is not changed b = 10
l × 10 = 270
l = 270/10
l = 27
new perimeter = 2(l + b)
= 2(27 + 10)
= 2 × 37
= 74 cm
Answered by
1
Answer:
perimeter - 74
Step-by-step explanation:
Length = 15
Breath = x
area = 150
l×b = 150
15×x = 150
b = 150/15
b = 10
area = 4/5 times
=150+(4/5×150)
=150+120
=270^2 cm
l×10 = 270
l = 270/10
l = 27
New Perimeter = 2(l+b)
= 2(27+10)
= 2×37
74
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