A tank measures 20m in length, 5m in breadth and it is 25m tall, what is the total surface of the tank

140m sq.

Step-by-step explanation:

The tank is a cuboid open at the top.

Surface area of a cuboid = 2(lb + bh + hl)

Surface area of a tank open at top = Surface area of cuboid - Area of the portion open at the top i.e.

2(lb + bh + hl) - lb = 2 (10*5 + 5*3 + 3*10) - 10*5

2(50+15+30) - 50 = 2*95 - 50 = 190 -50 = 140m sq.

option a is correct.

step-by-step explanation:

scale factor: it is used to find proportional measurements.

proportions means having the same ratio.

scale factor is the ratio of the model measurement to the actual measurement in a simplest form.

or we can say that the ratio of any two corresponding lengths in two similar geometric figures

if the scale factor is more than 1, then it is an enlargement,

if the scale factor less than 1, then it is a reduction.

given the two geometric figure:

by definition of proportions, we have

answer: what is the question you're trying to ask?

step-by-step explanation: