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If it takes 3 brick layers 6 hours to build a wall how long would it take 2 brick layers to build the same wall?
I think that'd be 8 hours. 6/3 = 2 hours/worker. One less worker, 2 more hours._____________________________________________________________________nine hoursEach bricklayer can complete 1/3 of the wall in 6 hours.Two brick layers can complete 2/3 of a wall in 6 hours (2 x 1/3).To complete the other 1/3 of the wall, the two brick layers would need another 3 hours.
A 15 metre long ladder is placed against a wall in such a way from the wall up to what height does the ladder reach the wall?
15 meters, or less, depending on the angle.
F equals m x a?
Force equals Mass times Acceleration, or F = M x A
Indirect proportion problems?
a man is building a fence for 3 days if 3 men build the fence, how many days can they build it? solution: 1x3=3/3= 1the answer is 1!===There's no such commonly recognised thing as 'indirect proportion'. If you mean Inverse Proportion, this is when one quantity decreases as another increases by the same factor.As an example, the time it takes to run 100 m is inversely proportional to the speed you run at - if you double your speed, it takes you half as long.Many maths problems run along the lines of "If it takes three men four days to build a wall, how long will it take five men to build the same wall?". This is inverse proportion. As you increase the number of men by a factor of 5/3, you decrease the time taken by a factor of 5/3, so the answer here is 2.4 days.I hope that helps!
How many blocks to build a retaining wall 21ft long and 3ft high?
Depends on the size of the block. However, an house brick is 9" x 3" x 4" So assuming the brick is laid 9" long and 3" high a single course of wall would require!!! 21 x 12 = 252 " Hence 252 / 9 = 28 bricks for the length & 9 x 12 = 108 " Hence 108 / 3 = 36 bricks in height Hence 36 x 28 = 1008 bricks is required!!!! If you wanted a double course wall (for support) that is 8 " wide. Then you need twice the number of bricks which is 2016 bricks.
