Question

12. What happens to the rectangle when
(a) Its length is doubles and breadth remaining the same?
m) Its length and breadth both are doubled?
ti) Its breadth becomes 4 times and length gets doubled
(iv) Find the breadth of a rectangle whose length is 70 cm and perimeter 20 cm.







Pls help


With easy explanation ​

Answer 1

Answer:

(1)area gets doubled if length is doubled while breadth remains same.

for eg let length be 2 and breadth be 4

area = L×B= 2×4=8

AFTER LENGTH IS DOUBLED

L=2×2=4,B=4

area=4×4=16

as we can see 16 is double of 8.

(2)same happens when breadth is doubled and length remain same.

(3) double the length and breadth

L=2×2=4,B= 4×4=16

area=16×4=64

so area increases by 4 times.

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