In a ΔABC, if AB + BC = 10 cm, BC + CA = 12 cm, CA + AB = 16 cm, then the perimeter of the triangle is ______.
A 19 cm
B 17 cm
C 28 cm
D 22 cm
It is given that, AB BC = 10 cm ...(i) BC CA = 12 cm ...(ii) CA AB = 16 cm ...(iii) Adding (i), (ii) and (iii); we get, 2(AB BC CA) = 10 12 16 â AB BC CA = 19 cm.
A rectangular field is 112 m long and 100 m wide. Two roads, each 3 m wide are to be constructed at the centre of this field; one is parallel to the length of the field and the other is parallel to the breadth of the field.
(i) Area of the part of the field, not covered by the roads.
(ii) Cost of constructing the road at ₹ 17 per m2.
|A||3248 m2||₹ 2890|
|B||10573 m2||₹ 10659|
|C||16582 m2||₹ 20480|
|D||10573 m2||₹ 1250|