Question
The speed of a boat in still water and the speed of the
stream are in the ratio of 5:2. If the boat's speed while moving downstream is 84 km/hr, how long will it take for the boat to cover a distance of 378 km upstream?Solution
Let the speed of the boat in still water and the speed of the stream be '5x' km/hr and '2x' km/hr, respectively
According to the question,
5x + 2x = 84
Or, 7x = 84
Or, x = 12
Upstream speed of the boat = 5x - 2x = 3x = 36 km/hr
Required time taken = (378/36) = 10.5 hours
1219.98 ÷ 30.48 × 15.12 = ? × 2.16
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.)...
`1804/898-:99/699xx749/751=?`
(√845 ×19.932+ √4230 ×14.385)/(√1765 ×4.877 ) = ?
Direction: Please solve the following expression and choose the closest option
`(13.022)^(2)+ (42.93)^(2)-(53.125)^(2)+(192.33xx14.88)=?- (88.44)^(2)- (42.03 xx 23.12)`
√49 + 6.66% of 1725 + 22² = ?² - √361Â
What approximate value will replace the question mark (?) in the following?
? =...
? = 49.97% of 38.09% of 1998.95
- 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.)
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