find the area
of right angle triangle
base = 6 cm
Hypotenuse =10 cm
Answers
Answer:
-------------
Let +p+ = unit price in Rs/meter
Let +c+ = meters of cloth actually purchased
----------------
(1) +p%2Ac+=+1600+
(2) +%28+p+-+40+%29%2A%28+c+%2B+2+%29+=+1600+
-----------------------------
(1) +p+=+1600%2Fc+
and
(2) +p%2Ac+-+40c+%2B+2p+-+80+=+1600+
(2) +p%2Ac+%2B+2p+-+40c+=+1680+
(2) +p%2A%28+c+%2B+2+%29+-+40c+=+1680+
(2) +%28+1600%2Fc+%29%2A%28+c+%2B+2+%29+-+40c+=+1680+
(2) +1600+%2B+3200%2Fc+-+40c+=+1680+
(2) +3200%2Fc+-+40c+=+80+
(2) +80%2Fc+-+c+=+2+
(2) +80+-+c%5E2+=+2c+
(2) +c%5E2+%2B+2c+-+80+=+0+
(2) +%28+c+%2B+10+%29%2A%28+c+-+8+%29+=+0+ ( by inspection )
+c+=+8+ ( must be positive )
and
(1) +p+=+1600%2Fc+
(1) +p+=+1600%2F8+
(1) +p+=+200+
-------------------
She purchased 8 meters of cloth
The price/meter was Rs 200
--------------------------
check:
(2) +%28+p+-+40+%29%2A%28+c+%2B+2+%29+=+1600+
(2) +%28200+-+40+%29%2A%28+8+%2B+2+%29+=+1600+
(2) +160%2A10+=+1600+
(2) +1600+=+1600+
Answer:
2 CM each = 10 this is the correct answer