Question:
If 90% of x is 315 km, then the value of x is
(a) 325 km
(b) 350 km
(c) 350 m
(d) 325 m
Solution:
(b) 350 km
Explanation: 90% of x is 315 km
90/100 × x = 315
X = 315 × 100/90 = 315 × 10/9 = 350
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