Question
A boat can travel 30 km downstream in 45 min. The ratio
of the speed of the boat in still water to the speed of the stream is 5: 3. How much time will the boat take to cover 25 km upstream?Solution
Speed of downstream = D/T = 30 × (60/45) = 40 km/hr The ratio of the speed of the boat in still water to the speed of the stream = 5: 3 (5x, 3x) => 8x = 40 => x = 5 Speed of upstream = 5x – 3x = 2x = 10 km/hr Distance = 25 km Time = D/S = 25/10 = 2(1/2) hr = 2 hour 30 min
(115.25 + 324.78) ÷ 4.99 = ?2 – 56.44Â
`[(sqrt(750) xx15.981) -: 54.003]` `xx` ? = 6997.81001
25.19% of (?2 ÷ 38.87 × 4679.94) = 6299.82 ÷ 419.78 × 50.15
?2 - 12.5% of 647.99 = 24.98% × 363.97 + 5% of 1059.98Â
What will come in the place of question mark (?) in the given expression?
?2 = {40% of (552 – 352 )} – 44
Amit and Bheem can individually finish a task in 10 days and 15 days, respectively. If they work together to complete the task an...
(752.09 - 43.04 x 7.94) ÷  16.9 = ?
25.902 × 78.095 + 999.996% of 200.08 + 20.005 % of 7999.997 = ? × 15.008 × 33.009
- What approximate value will come in place of the question mark (?) in the following question? (Note: You are not expected to calculate the exactvalue.)
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