Ans(d) a trapezium with an area of 5100 cm2 has the perpendicular distance between the two parallel sides of 60m . If one of the parallel sides be 40m. Find the length of the other side.
a. 130 m
b. 110 m
c. 120 m
d. 145 m ans: 130 m
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area of trapezium=5100cm^
distance between=h=60m
two parallel sides
one parallel side=40m
suppose other side be x
now,
area of trapezium=1/2×(sum of parallel sides )×h
5100=1/2(40+x)×60
60(40+x)=5100×2
40+x=10200÷60
40+x=1020/6
40+x=170
x=170-40
x=130
hence,the other parallel side is 130m
distance between=h=60m
two parallel sides
one parallel side=40m
suppose other side be x
now,
area of trapezium=1/2×(sum of parallel sides )×h
5100=1/2(40+x)×60
60(40+x)=5100×2
40+x=10200÷60
40+x=1020/6
40+x=170
x=170-40
x=130
hence,the other parallel side is 130m
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