Question

From an iron bar of length (20 –7y) m, a piece of length (2y –1) m
was cut. Find the length of the remaining iron bar.

Answer 1

Step-by-step explanation:

remaining length = original length - length of cut piece

=> 20. - 7y - [ 2y - 1 ]

=> 20 - 7y - 2y + 1

=> 21 - 9y m

therefore remaining length = 21 - 9y m

Answer 2

SOLUTION

GIVEN

From an iron bar of length (20 –7y) m, a piece of length (2y –1) m was cut.

TO DETERMINE

The length of the remaining iron bar.

EVALUATION

Length of the iron bar = ( 20 - 7y ) m

The length of the bar cut = ( 2y - 1 ) m

Hence the required length of the remaining iron bar

= ( 20 - 7y ) m - ( 2y - 1 ) m

= ( 20 - 7y - 2y + 1 ) m

= ( 21 - 9y ) m

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