81
27
19
127
181
Correct answer is A
x∝1y
x=ky
y∝t2
y=ct2
k and c are constants.
x=kct2
Let kc=d (a constant)
x=dt2
1=d32⟹d=9
∴
x = 9 \div (\frac{1}{3})^{2}
= 9 \div \frac{1}{9} = 9 \times 9 = 81
The angle of elevation of an aircraft from a point K on the horizontal ground 30\alpha. If the a...
Find all real numbers x which satisfy the inequality \frac{1}{3}(x + 1) - 1 > \frac{1}{5}...
Simplify \frac{1\frac{7}{8} \times 2\frac{2}{5}}{6\frac{3}{4} \div \frac{3}{4}}...
Find the least value of x which satisfies the equation 4x = 7(mod 9) ...
If e^{x} = 1 + x + \frac{x^{2}}{1.2} + \frac{x^{3}}{1.2.3} + ... , find \(\frac{1}{e^{\frac{1}{2...
If tan x = \frac{1}{\sqrt{3}}, find cos x - sin x such that 0^o \leq x \leq 90^o...
In the diagram above PS||RQ, |RQ| = 6.4cm and perpendicular PH = 3.2cm. Find the area of SQR ...