The area of a trapezium is 180 and its height is 9 cm. If one of the parallel sides is longer than the other by 6 cm, find the two parallel sides
a) 15 cm, 21 cm
b) 14 cm, 20 cm
c) 17 cm, 23 cm
d) 12 cm, 18 cm
Sol:
Let one of the parallel sides be x cm. and other be (x + 6) cm.
Area of a trap.
40 = 2x + 6
=>x=17
Two parallel sides are 17cm and 23 cm.
