Question
A boat goes 50 km in upstream in 5 hours and takes 4
hours to complete a distance of 16 km in downstream. Find the speed of boat in still water.Solution
Speed of boat in still water = (D + U)/2 Upstream speed (U) = 50/5 = 10 km/hr Downstream speed (D) = 16/4 = 4 km/hr Speed of boat in still water = (10 + 4)/2 = 14/2 = 7 km/hr
20.22 × 11.99 + 140.15 = ?
Amit and Bheem can individually finish a task in 10 days and 15 days, respectively. If they work together to complete the task an...
In a village election, 300 votes were declared invalid. The winning candidate secured 60% of the valid votes and won by a margin of 1,500 votes. Find th...
(74.93% of 640.11 + 3/4 of 359.79)² - (1/3 of 80.87 × 2)² = ?
[(120.96 × 12.09) ÷ ?] ÷ 6 = 19.96% of 55.07
620.15 + 1279.98 + ? × (4.79)2 = 149.95% of 1600.14
(8.86)² × (15.01)² ÷ √624.99 = 9?
(√360.99 + 161.14) ÷ 5 × 249.98 = ?
420.11 ÷ 13.98 × 5.14 – 124.9 = √?Â
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