Question

when cold an iron rod is 200 cm. when heated, the length increase to 200.8 cm, calculate the percentage increase in the length of the rod.​

Answer 1

Step-by-step explanation:

ORIGINAL LENGTH = 200 CM

LENGTH INCREASE IS 0.8 CM

THEREFORE, PERCENTAGE INCREASE IS

0.8/200× 100

0.4%

Answer 2

Given :

• when cold an iron rod is 200 cm.

• when heated, the length increase to 200.8 cm

To Find :

• percentage increase in the length of the rod.

Solution :

length increase = 200.8 cm - 200 cm

= 0.8 cm

∴ required % = ( 0.8cm/200.8cm × 100 ) %

= ( 80cm/200.8cm ) %

= ( 10/25.1 ) %

= 0.398 %

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∴ percentage increase in the length of the rod is 0.398 %