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Secondary 1 | Maths
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pls help!!
Date Posted: 2 years ago
Views: 273
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False
For 100% speed, consider time taken to be x
At 130% speed,
Time taken =
100%/ 130% * x = 10/13 x
Time decrease =
Time difference/ original time * 100%
(x - ( 10/13 ) x )/ x * 100%
= 3/13 * 100%
= 23.1% (3SF / 1 Digit)
NOT 30%
For 100% speed, consider time taken to be x
At 130% speed,
Time taken =
100%/ 130% * x = 10/13 x
Time decrease =
Time difference/ original time * 100%
(x - ( 10/13 ) x )/ x * 100%
= 3/13 * 100%
= 23.1% (3SF / 1 Digit)
NOT 30%
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