Using formula – simple examples

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```					                Using formula – simple examples

Use the formula given with the data supplied

d
1.   s     ; d = 180km and t = 1hour 30 minutes
t

2. C =     d ; d = 19cm.

3. A =     r2 ; r = 5.4cm.

4. V = LBH ; L = 9cm , B = 13cm and H = 8cm.

5. A = LB ; L = 5.6cm and B = 4.5cm

1
6. A =       BH ; B = 23cm and H = 14cm.
2

h
7. A =       a  b  ; h = 9cm , a = 14cm and b = 11cm.
2
C
8. d          ; C = 70cm.


9. A = 2(LB + BH + LH);      L=14cm, B=11cm and H=9cm.

10. V=  r2h ; r = 8cm and h = 5.5cm.

11. A = 2  rh ; r = 9cm and h = 12cm.

D
12. T         ; D = 240 miles and S = 54mph.
S

1 2
13. V=       r h ; r = 14cm and h = 8cm.
3

1 2
14. E =        mv ;   m = 40kg and v = 8 mps.
2

15. E = mgh       ;   m = 2kg , g = 9.8 mps2 , h = 4m.
16. v = u + gt ;          u = 12mps, g = 9.8 and t = 5 secs.

17. C =    a 2  b2       ;   a = 12 and b = 13.

L
18. T  2            ;   L = 45m and g = 9.8.
g

19. C = 2.54N + 10.50 ;            N = 56.

20. D = S × T ; S = 45mph and T = 1hour 15 minutes.

21. y = mx + c ; m = 0.25 , x = 8 and c = 4.

22. %p =
BP  SP   100%       ; BP = £1400 , SP=£1100
BP

23. A = 2  rh + 2  r2 ; r = 8cm and h = 5cm.

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