Question

The parallel sides of the trapezium field are 80 m
and 20 m. These sides meet the third side at right
angle . The length of the fourth side is 90 m. If its
cost is rupees 5 to plough per m2 of the field, find the total
cost of ploughing field

Answer 1

Answer:

Area of trapezium = 4242.5m²

cost of ploughing the trapezium field =

Rs.21212.5

Answer 2

Answer:

area of trapezium = 3354m^2

cost of ploughing field = rs 1677

Step-by-step explanation:

area of trapezium = 1/2×(sum of parallel side)×( distance between them)

= 1/2×(a×b)×h

by phythagoras formula

then, h^2 = 90^2 - 60^2

h^2 = 8100 - 3600

h = √4500 = 67•08

area of trapezium = 1/2 × ( 80×20) × 67•08 = 3354m^2

and cost of ploughing field = rs 1677