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Question
If 90% of x is 315 km, then the value of x is ______.
Options
325 km
350 km
405 km
340 km
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Solution
If 90% of x is 315 km, then the value of x is 350 km.
Explanation:
Given,
90% of x = 315 km
⇒ `90/100 xx x = 315`
⇒ 90x = 315 × 100
⇒ `x = (315 xx 100)/90`
⇒ x = 350 km
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