the figure shows a block of wood with uniform cross section and it is 28 cm long find the volume of the block and the total surface area of the block
Attachments:
Answers
Answered by
6
Step-by-step explanation:
volume = area of trapezium base * height
= 1/2 * 7 * (8+12) * 28
= 1960 cm³
surface area = 2*area of trapezium + 7*28 + 8*28 + 12*28 + 8.06*28
= 2*70 + 28*(7+8+12+8.06)
= 140 + 28*35.06
= 1121.68 cm²
Similar questions