A student measured the length of a room and obtained the ...
A student measured the length of a room and obtained the measurement of 3.99m. If the percentage error of is measurement was 5% and his own measurement was smaller than the length , what is the length of the room?
3.78m
3.80m
4.18m
4.20m
4.788m
Correct answer is D
Let the actual length of the room = y m
∴
100(y - 3.99) = 5y \implies 100y - 399 = 5y
100y - 5y = 399 \implies y = \frac{399}{95}
y = 4.2 m
Find the quadratic equation whose roots are \frac{2}{3} and \frac{- 3}{4}...
In the diagram |XY| = 12cm, |XZ| = 9cm, |ZN| = 3cm and ZY||NM, calculate |MY| ...
Find the area of the sector OPSQ ...
If x + 0.4y = 3 and y = \frac{1}{2}x, find the value of (x + y)...
Simplify \frac{2.25}{0.015} leaving your answer in standard form...
Factorize the following expression; 2x2 + x - 15...
Evaluate x2(x2 - 1)-\frac{1}{2} - (x2 - 1)\frac{1}{2}...
A hunter 1.6 m tall, views a bird on top of a tree at an angle of 45°. if the distance between t...