Question
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.) (10.98³- 31.12²) ÷ (8.92²- 76.11) = ? X 4.11 - (13.11²- 2.91)Solution
ATQ,
(10.98³- 31.12²) ÷ (8.92²- 76.11) = ? X 4.11 - (13.11²- 2.91)
(11³- 31²) ÷ (9²- 76) ~ ? X 4 - (13²- 3)
(1331 - 961) ÷ (81 - 76) ~ ? X 4 - (169 - 3)
370 ÷ 5 ~ ? X 4 - 166
74 ~ ? X 4 - 166
? X 4 ~ 240
? ~ 60
A boat can cover 40 km upstream and 60 km downstream in 13 hour. Also it can cover 50 km upstream and 72 km downstream in 16 hour. Find the speed of boa...
- A boat covers a distance of 270 km downstream in 6 hours. If the boat's speed in upstream direction is one-third of its downstream speed, calculate the tim...
Speed of a boat in still water to speed of boat in upstream is 12:7. If the boat can travel 340 km in downstream in 5 hours, then find the time taken by...
The speed of a boat in still water is 200% higher than the speed of stream. If the boat takes 4 hours to cover 96 km downstream, find the time it will t...
The speed of a boat is that of the current of water is 30:7. The boat goes along with the current in 4 hours 12 minutes. It will come back in
A boat can cover 84 km upstream and 252 km downstream in 14 hours. Speed of the stream is how much less than the speed of the boat in still water if the...
- The speed of a boat in still water is 1.5 times more than that of the current. If the boat takes 15 hours to cover 180 km upstream, then find the time take...
Determine the speed of a Ship in calm water, given that the Ship's speed downstream is 20% greater than its speed in still water. If the Ship can cover ...
If the sum of upstream and downstream speed is 20 km/hr and the speed of the current is 5 km/hr. Then find time taken to cover 45 km in downward?
The speed of current is 8 km/h. What will be the respective downstream speed and upstream speed of a boy rowing a boat, if one fifth of the distance cov...