Question

A time duration of 8mins 40seconds was wrongly noted as 6mins 50seconds . Find the error percentage.​

Answer 1

Given

Correct time duration = 8 min 40 sec

Incorect time duration = 6 min 50 sec

Solution

Correct time duration = 8 min 40 sec

= 8×60 + 40 = 480+40= 520 sec

Incorect time duration = 6 min 50 sec

= 6× 60 +50 = 360+50 = 410 sec

Error in time = 520 - 410

= 110 sec

error % = 110/520 ×100 = 21.153%