This is the concept of trigonometry, to get the possible length of side a we use the sine rule which states that: a/sin A=b/sin B=c/sin B where; a,b and c are the sides A,B and C are the angles thus the value of A could be as follows; assuming the triangle is an isosceles triangle, the base angles will be: (180-40)/2=70 thus; 15/sin 70=a/sin 40 a=(15sin40)/sin70 a=10.26 inches thus the possible size of a=10.26 inches
1 litre of 10% solution contains 100mL of iodine 1 litre of 90% solution contains 900mL of iodine Mixing them will produce 2 litres of solution containing 1000mL of iodine which is 50% iodine. To produce 8 litres of 50% iodine they can mix 4 litres of 10% and 4 litres of 90%
