Question
Ravi travels the first 40% of a certain distance at a
speed of 20 km/h, the next 30% at 10 km/h, and covers the remaining 30% at 12 km/h. Calculate Ravi's average speed for the entire journey in meters per second.Solution
Let the total distance be '100d' km. Time taken by Ravi to cover 40% distance = (40d/20) = '2d' hours Time taken by Ravi to cover 30% distance = (30d/10) = '3d' hours Time taken by Ravi to cover remaining distance: = (100d - 40d - 30d) ÷ 12 = (30d/12) = '2.5d' hours So, average speed = 100d ÷ (2d + 3d + 2.5d) = (100/7.5) = (40/3) km/h = (40/3) X (5/18) = (100/27) m/s
The income of Surya is Rs. 75,000. He spent 16(2/3)% of his income on food, 60% of the remaining income on rent and saved 44% of the income remaining a...
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HCF and LCM of two numbers are 13 and 455. If one number lies between 60 and 70, then the other number lies between
(32) -3/5 = ?
? = 49.99² ÷ (1.98⁵ + 8.01 × 89.91) + 75.15% of (263.89 × 49.11)
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A regular hexagon has a side length of 6 units. What is the area of the hexagon?
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Solve: 2(x+3) = 8(x–1)
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