Can u answer this 7 question
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mukunth1:
its from r. d sharma... but its impossible to answer these many questions.
its very easy......
Hello u have to do only 7th sum
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Perimeter of the rhombus = 32 m
Length of each side = a = 32/4 m = 8 m
Length of one diagonal = d1 = 10m
Length of the other diagonal = d2
(d1/2)² + (d2/2)² = a²
=> (10/2)² + (d2/2)² = 8²
=> 25 + (d2/2)² = 64
=> (d2/2)² = 64 - 25 = 39
=> d2/2 = √39
=> d2 = 2√39 m
Area of the rhombus = A = (1/2)d1*d2
= (1/2)*10*2√39 m² = 10√39 m² =10*6.245 m² = 62.45² m²
Area of both the sides = 2A = 2*62.45 m² = 124.90 m²
Cost of painting = Rs124.90 * 5 = Rs 624.50
Length of each side = a = 32/4 m = 8 m
Length of one diagonal = d1 = 10m
Length of the other diagonal = d2
(d1/2)² + (d2/2)² = a²
=> (10/2)² + (d2/2)² = 8²
=> 25 + (d2/2)² = 64
=> (d2/2)² = 64 - 25 = 39
=> d2/2 = √39
=> d2 = 2√39 m
Area of the rhombus = A = (1/2)d1*d2
= (1/2)*10*2√39 m² = 10√39 m² =10*6.245 m² = 62.45² m²
Area of both the sides = 2A = 2*62.45 m² = 124.90 m²
Cost of painting = Rs124.90 * 5 = Rs 624.50
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