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Question
The table top is in the shape of a trapezium with measurements given in the figure. Find the cost of the glass used to cover the table at the rate of ₹ 6 per 10 sq.cm
Solution
Length of the parallel sides a = 200 cm
b = 150 cm
Height h = 50 cm
Area of the trapezium = `1/2` × h (a + b) sq.units
= `1/2` × 50(200+ 150) cm2
= `1/2` × 50 × 350 cm2
= 8750 cm2
Cost for 10 sq.cm glass = ₹ 68
∴ Cost of 8750 cm2 glass = `8750/10 xx 6` = ₹ 5250
Cost of glass used = ₹ 5,250
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