Question

the radius and slant height of a cone are in the ratio 5:7
if it is covered surface area is 2750 CM square find its radius​

Answer 1

Answer:

$let \: the \: radius(r) \: and \: slant \: heigt(l) \: of \: \\the \: cone \: be \: 5x \: cm \: and \: 7x \: cm\: respectively. \\ \therefore \: curved \: surface \: area \: of \: a \: cone \: = \pi \: r \: l \\ \therefore \: 2750 = \frac{22}{7} \times 5x \times 7x\\ \therefore \: 2750 = 22 \times 5x^{2} \\ {x}^{2} = \frac{2750}{22 \times 5} = \frac{2750}{110} = 25 \\ {x}^{2} = 25 \\ \implies \: x = 5 \\ \therefore radius \: r = 5x = 5 \times 5 = 25 \: cm.$

Answer 2

Answer:

ans: 25cm

Step-by-step explanation:

hope this helps you <3