The dimensions of a tin box are 4m * 3.5 m * 3m. If 25 such boxes are to be made. Find the area of the tin sheet required.

1750 m²

Step-by-step explanation:

Dimension of tin box = 4m * 3.5 m * 3m

Length, l = 4 ; width, W = 3.5 ; height, h = 3

Total Surface area= 2(lw * lh * wh)

= 2((4*3.5) + (3.5*3) + (3.5 * 3))

= 70 m³

Area required to make 25 ;

25 * 70m³

= 1750 m³

what is the original number? you forgot to add it.

- "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."