Area Problems The length of a rectangular field is 100 m and its breadth is 40 m. What will be the area of the field? (4 x 103) sq m (4 x 102) sq m (4 x 10) sq m (4 x 104) sq m (4 x 103) sq m (4 x 102) sq m (4 x 10) sq m (4 x 104) sq m ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Required area = Length x Breadth= 100 x 40 = 4000 sq m= 4 x 103 sq m
Area Problems A man walked diagonally across a square plot. Approximately what was the percent saved by not walking along the edges? 10% 30% 20% 40% 10% 30% 20% 40% ANSWER EXPLANATION DOWNLOAD EXAMIANS APP let the side of the square be x meterslength of two sides = 2x metersdiagonal = 2 x = 1.414x m saving on 2x meters = .59x m saving % = 0 . 59 x 2 x * 100 % = 30% (approx)
Area Problems If the length of diagonal AC of a square ABCD is 5.2 cm then area of the square ABCD is? 10 sq.cm 13.52 sq.cm 12.62 sq.cm 15.12 sq.cm 10 sq.cm 13.52 sq.cm 12.62 sq.cm 15.12 sq.cm ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Area = 1/2 x (Diagonal)2= (1/2) x 5.2 x 5.2 cm2= 13.52 cm2
Area Problems The area of a right angled triangle is 10 sq cm. If its perpendicular is equal to 20 cm, find its base. 3 cm 4 cm 1 cm 2 cm 3 cm 4 cm 1 cm 2 cm ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Given that, area = 10 sq cm, perpendicular = 20 cm and base = ? area = (base x Perpendicular) / 2 ? 10 = (base x 20) / 2 ? base = 1 cm
Area Problems A hall 20 m long and 15 m broad is surrounded by a verandah of uniform width of 2.5 m. the cost of flooring the verandah at the rate of 3.50 per sq. meter is? Rs. 800 Rs. 500 Rs. 700 Rs. 600 Rs. 800 Rs. 500 Rs. 700 Rs. 600 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Area of verandah = [(25 x 20) -(20 x 15)] m2= 200 m2? Cost of flooring = Rs. (200 x 3.50)= Rs. 700
Area Problems A tank is 25m long 12m wide and 6m deep. The cost of plastering its walls and bottom at 75 paise per sq m is Rs. 258 Rs. 458 Rs. 558 Rs. 358 Rs. 258 Rs. 458 Rs. 558 Rs. 358 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Area to be plastered = 2 l + b × h + l × b = 2 25 + 12 × 6 + 25 × 12 = 744 s q . m Cost of plastering = 744 × 75 100 = R s . 558
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