Question

P, Q and R are the mid points of the sides BC, CA and AB respectively of △XYZ. Then the
ratio of the areas of △PQR and △ XYZ is?

Answer 1

Step-by-step explanation:

Science, any system of knowledge that is concerned with the physical world and its phenomena and that entails unbiased observations and systematic experimentation. In general, a science involves a pursuit of knowledge covering general truths or the operations of fundamental laws.

Answer 2

Using LCM method you can solve this question in the following manner-

GIVEN :-

A & B together takes 6 days and A alone takes 15 days to complete the work

we can write it as -

A+B = 6

A= 15

Now finding total unit work by taking LCM of 6 & 15 which is 30

Total unit work = 30

Now finding unit work completed in 1 day by dividing total unit work by their respective 1 day work

Unit work done in 1 day-

A+B=30/6=5 ——-(1)

A=30/15=2 ——-(2)

Putting value of A in eq. (1) we get

B=3

Now for finding total days required by them to complete the whole work alone we will divide the total unit work their respective 1 day work-

Hence total days required by B to complete the whole work alone is-

30/3=10 days