Question
The speed ratio of Y and Z is 5 : 4. If Y increases his
speed by 25%, he can cover 300 km in 4 hours. How long will Z take to travel 192 km?Solution
ATQ, Increased speed of Y = (300/4) = 75 km/hr So, actual speed of Y = 75 ÷ 1.25 = 60 km/hr Or, speed of Z = 60 × (4/5) = 48 km/hr Therefore, required time = (192/48) = 4 hours
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