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
(√845 ×19.932+ √4230 ×14.385)/(√1765 ×4.877 ) = ?
{(√2305) % of 74.69} × 15.21 - 27.89 × 44.88 + 45.12% of 2399.87
The greatest number that will divide 398,436, and 542 leaving 7, 11, and 15 as remainders, respectively, is:
2470.03 ÷ 64.98 x 39.9 = ? + 20.32
(1709.87 ÷ 38.09) + (768.11 ÷ 23.87) + (6599.81 ÷ 88.06) = ?
25.02% of 460.02+?% of 300.02=295.21
What is the area (in cm²) of a square inscribed in a circle with a radius of 10√2 cm?
- What approximate value will come in place of the question mark (?) in the following question? (Note: You are not expected to calculate the exact value.)
65.22 of 359.98% + 459.99 ÷ 23.18 = ?
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