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प्रश्न
Two cross roads, each of width 10 m, cut at right angles through the centre of a rectangular park of length 700 m and breadth 300 m and parallel to its sides. Find the area of the roads. Also find the area of the park excluding cross roads. Give the answer in hectares.
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उत्तर
Length (l) of park = 700 m
Breadth (b) of park = 300 m
Area of park = 700 × 300 = 210000 m2
Length of road PQRS = 700 m
Length of road ABCD = 300 m
Width of each road = 10 m
Area of the roads = ar (PQRS) + ar (ABCD) − ar (KLMN)
= (700 × 10) + (300 × 10) − (10 × 10)
= 7000 + 3000 − 100
= 10000 − 100 = 9900 m2 = 0.99 hectare
Area of park excluding roads = 210000 − 9900 = 200100 m2 = 20.01 hectare
संबंधित प्रश्न
A garden is 90 m long and 75 m broad. A path 5 m wide is to be built outside and around it. Find the area of the path. Also find the area of the garden in hectare
20 l – 1 l 500 ml = ……… l ………. ml
Convert into indicated units:
300 mg into g
Compare and put > or < or = in the following:
600 ml + 400 ml `square` 1 l
Compare and put > or < or = in the following:
88 cm `square` 8 m 8 cm
Compare and put > or < or = in the following:
55 g `square` 550 mg
Put ✓ mark in the circles which adds upto the given measure
9500 mg = _______ g _______ mg
5 l 400 ml = ________ ml
10 cm2 = ______ m2.
