Two concentric circles drawn with the radius of inner circle 6cm and outer circle radius 50% more than inner circle. What is the area of the annulus formed between two circles?
\( \frac{890}{7} \) cm²
\( \frac{900}{7} \) cm²
990 cm²
\( \frac{990}{7} \) cm²
A bus is travelling with \( \frac{7}{8} \) of its actual speed to cover 42 km in 1 h 16 min. Find the actual speed of the bus.
(Note: Discrepancy found in this question. Question ignored for all candidates.)
If cosecA – cotA = 3 then cosecA + cotA = ?
\( \frac{1}{3} \)
\( \frac{1}{2} \)
\( \frac{1}{5} \)
\( \frac{3}{2} \)
If \( \frac{a}{b} \) = \( \frac{b}{c} \) = \( \frac{c}{d} \), then \(\frac{b^3+c^3+d^3}{a^3+b^3+c^3}\) will be equal to:
\( \frac{a}{d} \)
\( \frac{d}{c} \)
\( \frac{d}{a} \)
\( \frac{b}{d} \)