Does anyone know the answer for the volume of the cuboid question?I got that x was 1.5 or something

This was posted from The Student Room's Android App on my HTC Desire

Reply 44

xxcharlotteoxx

Does anyone know around what amount of marks i would need out of 80 to get myself an a*?? :smile:

Reply 45

the_googly

Original post by Will2012

you had s going ----> and t was going bottom left. X was on the top right. So -s +t + the bottom bit which was 1.5s, as the ratio was 3:1 so 1.5:1. so -s+t+1.5s =t+1/2s

Would 0.5s + t be correct?

Reply 46

Will2012

x was 3 for the cuboid question if i remember correctly, and ^ yes

Reply 47

the_googly

Thanks

I got 38.7 for the area question of the two triangles. I didn't use sine/cos sine rule at all. I used cos rule to find out the base of the right angle triangle and then pytagoras to find out the height. I think i also used the cos rule to find out the opposite side of the 43* angle also. Used the other area of triangle formula to calculate the area and added it to the first area. :rolleyes:

Reply 48

Will2012

Original post by the_googly

think the answer was 36.something :tongue:

Reply 49

the_googly

Original post by Will2012

think the answer was 36.something :tongue:

Just realised my mistake, i thought the angle in the top right corner was a right angle :colondollar:

Reply 50

the_googly

What about the bearing questions.

The question where one of the angles was 342? I got 18 as my answer for that.

Reply 51

lewisbee

Original post by the_googly

What about the bearing questions.

The question where one of the angles was 342? I got 18 as my answer for that.

I got 342 again because you need to reverse it as a bearing can only go clockwise so 360-18=342 but you may get one mark for the working :smile:

Reply 52

willcarson

i think that 1/2s + t is simpler written as s + 2t?

Reply 53

JDee

Original post by the_googly

What about the bearing questions.

The question where one of the angles was 342? I got 18 as my answer for that.

Original post by lewisbee

I got 342 again because you need to reverse it as a bearing can only go clockwise so 360-18=342 but you may get one mark for the working :smile:

- I got something in the region of 150-180 degrees for the bearings question.

Reply 54

lewisbee

Original post by JDee

- I got something in the region of 150-180 degrees for the bearings question.

How did you do that are you sure that this was not for the first bearings question??

Reply 55

JamezA60

Original post by lewisbee

I got 342 again because you need to reverse it as a bearing can only go clockwise so 360-18=342 but you may get one mark for the working :smile:

I got 18

From C to D was 342 degrees
so i thought from D to C would be 18 degrees as you're going the other way in a 360 degree angle D:

Reply 56

Will2012

Original post by JamezA60

I got 18

From C to D was 342 degrees
so i thought from D to C would be 18 degrees as you're going the other way in a 360 degree angle D:

18+90 so 108

Reply 57

lewisbee

no it was 342 from what I got also think of the logic they are not going to give 2 marks for working out 360-342 because it is too simple

Reply 58

lewisbee

Original post by Will2012

18+90 so 108

yes but didn't he go over 180 degrees so therefore it has to be out of 360 degrees??

Reply 59

Davelittle

The quadratic equation was to 2 significant figures by the way :smile:

Also the arc one was 8.83, if you look the sector isn't big enoug to be a semicircle so the only way is to find out the angle was 60 degrees and work from there.

On the area question I got 36.2 because of my previous rounding, I hope that gets the whole 7 marks!!