Will mark BRAINLIEST!

Rectangular prism is a cuboid.

Surface area of a cuboid = 2lw+2wh+2hl

So, here,

Surface area = 2lw+2wh+2hl

=> Surface area = [2(10cm)(3cm)] + [2(3cm)(20cm)] + [2(20cm)(10cm)]

=> Surface area = 60cm² + 120cm² + 400cm²

=> Surface area = 580cm²

Surface area =2( 200+30+60) = 580 cm³

15

step-by-step explanation:

we are given the following expression and we are to solve it and find the product:

-13 × (-5)

solving the given expression in the standard order of solving a mathematical expression, beginning with the opening of brackets and then multiplying the terms and changing their signs.

-3 × -5 = 15 (answer is positive because when negative is multiplied with negative, it gives a positive answer)