Which of the following formulas would find the lateral area of a right cone where r is the radius and s is slant height?

a. la=1/2

b. la=2 pi rs
c. la=pi rs
d. la=rs

For a right circular cone, the lateral surface area is given by,

The value of square root of h²+r² is equal to slant height s.

So replacing the value of square root of (h²+r²) by s in the formula for lateral surface area , we have

L.S.A. = pi * r * s

where s is slant height of the given right cone.

The lateral surface area of a right cone is pi*r*s.

Option C is the correct answer.

investment b is an ordinary annuity with $3,909.64 in the account after one year.

step-by-step explanation:

the height of the surface increases from the center out to the sides of the road.

step-by-step explanation:

as we move out we move away from the x-axis.

and as mentioned in the problem statement that height of a road increases when we move away from the center x.

hence proved that 3rd option

the height of the surface increases from the center out to the sides of the road.

is the correct option.