The base of a prism is an equilateral triangle with and area of 52.4 cm squared. The area of each lateral face is 66 cm squared. What is the surface area?

Therefore the total surface of the prism is 302.8 cm squared.

Step-by-step explanation:

Triangular Prism:

Given that, the base of a prism is an equilateral triangle with area of 52.4 cm squared. The area of each lateral face is 66 cm squared.

The surface area of the given prism =

Here

 and  

Therefore the total surface of the prism is

={(2×52.4)+(3×66)}cm squared

=302.8 cm squared

i did it myself and i got 4.2 (b) hope its right

step-by-step explanation:

- "runner b is moving at a slower rate."

- "the graphs shown are graphs of distance(km) against time(min).

the slopes of this graphs are are given by:

slope = (change in y)/(change in x)

= (change in distance)/(change in time)

this is the formula for finding the speed. so, the slope of these graphs represent the speed of the runner.

taking each division in the graph to represent 1 on both axis:

runner a ⇒ speed = (2-0)/(1-0)

= 2/1

= 2 km/min

runner b ⇒ speed = (3-0)/(3-0)

= 3/3

= 1 km/min

this shows that   runner b is moving at a slower rate."