Let Beth be x Keith = x+ 120 Keith gives 1/6 to Beth=1/6x+20 So, Beth=7/6x + 20 Keith=5/6x+100 (7/6x+20)-20=(5/6x+100) 7/6x=5/6x+100 7/6x-5/6x=100 2/6x=100 X=300 Keith=300+120=420 Ratio of Keith to Beth is 420:300 Simplest form 7:5

Thanks Jean yr steps are definitely much simpler than mine. Easier for my P6 kid to understand. Thank you vm.

Don't mention. It's from my son

a) 192km b) 64 km/h c) 2h Right?

a)48×4= 192 b)48km÷ 3/4h= 64 km/h c)4×45=180 180min-15min-45min=2h

Sorry. c) 192÷2=96

Yes. Correct. For B , do we take 48 km÷1 hr ( 15 + 45 mins) since Dick set off 15 mins earlier? Tks Bak Eng

No. Dist for last quarter is 48km and time taken is 45min.

Tks Bak Eng.

Ans for Part B This is from Kai Meng: Only the water above the 20cm mark will be affected. {(28-20)×756.25} ÷ (756.25+ 5×5) = increase in height of (Affected volume above 20cm in A) ÷ (Combined base area of A and the square base of the upper cuboid in B)

Thanks Jean Lee

A)756.25x14=10587.5

Area of triangle is 1/2 times base times height which is equal to half of the area of one rectangle. So it's 1/8 which is 12.5%

@xu, can u show how u get 1/8?

What's the area of the rec?

Don't get it from pic?

Half of the square is(1part) shaded hence if we break all the square into 2 parts, we will have 8 parts. 1/8 x 100 = 12.5%

Thanks a lot !

Thanks Samantha

Half the rectangle. There are four rectangles in total. So half a rectangle out of four rectangles that's how I get 1/8

No need to know the exact values for this question

Since each rectangle is made up of 2 halves, there will be eight halves in total