If ` qr : pr : pq = 1:4:7," then find " p/(qr) : q/(pr)`.

If p:q=3:4 and q:r=8:9 then p:r is

If p>q>0 and pr<-1

In Delta PQR, M is "the midpoint of" side QR. If PQ = 11, PR = 17 "and" QR = 12 "then find PM" .

Find the value of the expressions, when p= -3, q= -1" and "r= 2 4pq^(2)+7qr-6pr

If p = 4, q= 3 and r = -2, find the values of : (p^(2)+q^(2)-r^(2))/(pq+qr-pr)

In the given figure L, M and N are mid point of the sides PQ, PR and QR respectively of DeltaPQR . If PQ = 4.4 cm, QR = 5.6 cm and PR = 4.8 cm then find the perimeter of DeltaLMN .

In Delta PQR, Point S is the midpoint of side QR. If PQ = 11, PR = 17, PS = 13 then find QR.

If P Q R\ ~= E F D , then E D= PQ (b) QR (c) PR (d) None of these

If q is the mean proportional between p and r , show that : pqr (p + q + r)^(3) = (pq + qr + pr)^(3) .