Jtutor:

Hi awesomeguy!


Allow me to help you:

(b) angle DBC = angle BCP (alt angles)
tan angle DBC = 15/20
angle DBC = 36.9 degrees = angle BCP

(c) Area of triangle BCD = 1/2 x 15 x 20 = 150cm^2
Find the length of BD => 25cm (Pythagoras' theorem)
Use common area of triangle:
1/2 x BD x Vertical Height = 150
1/2 x 25 x h = 150
h = 12cm

Cheers!

:thankyou:
Thanks Jtutor!
:thankyou:

http://i50.tinypic.com/t8b47n.jpg\">

I know the answer for part (a), 3000cm3 but I don't know how to do parts (b) and (c). Each part is 2 marks each. Thanks! :? :? :?
bigger image: http://i45.tinypic.com/2zrqf60.jpg

Sec 2 Express Math Qn Proportion


For an adventure camp, food is bought to last for 15 days for a group of 40 students. \tIf 4 students left the camp after 6 days, how many days can the food last for the \tremaining 36 students?

Please help. Thanks

Sec 2 Express Math Qn Proportion


For an adventure camp, food is bought to last for 15 days for a group of 40 students. \tIf 4 students left the camp after 6 days, how many days can the food last for the \tremaining 36 students?

Please help. Thanks