Question

A person pedals from his house to his office at a speed of [tex] {y_1} [tex] He covers half the distance at 30 km/he and the rest at 70 km/hr. What is the total distance of the journey?​

Answer 1

Step-by-step explanation:

ANSWER

Let ABC be a triangle,

We can extend BA past A into a straight line,

Then there is a point D such that DA=CA

Therefore, from Isosceles triangle has two equal angles,

∠ADC=∠ACD

Thus, in △DCB,

∠BCD>∠BDC (Side opposite greater angle is larger)

Thus, BD>CD

BA+AD>CD (Since, AC=AD)

BA+AC>CD

The sum of any two sides of the triangle is greater than the third side.