Question

P is 300 kms eastward of o and q is 400 kms north of o. R is exactly in the middle of q and p. The distance between q and r is

Answer 1

${qr}^{2} = {ro}^{2} + {oq}^{2} \\ \\ {x}^{2} = {400}^{2} + {150}^{2} \\ \\ {x}^{2} = 1600 + 22500 \\ \\ {x}^{2} = 24100 \\ \\ x = + - \sqrt{24100}$