A heavy rope, 50 ft long, weighs 0.6 lb/ft and hangs over the edge of a building 140 ft high. Approximate the required work by a Riemann sum, then express the work as an integral and evaluate it. How much work W is done in pulling the rope to the top of the building?

the surface area is 124cm²

step-by-step explanation:

length: 4cm

width: 9cm

height:   2cm

i those same problems in math and dont know how to do them

86

step-by-step explanation:

find the area of the triangle then multiply by 2 then add the area of the parollelegram multiplied by 2