Question

18)Simplify:(a) (3

0-2

0) x 6

0

(b) (2

2 x2

4) ÷2

3

19) Solve(a) ??

+ 5=25

(b) 2x-40=60

20)A school hall 25 m long and 15 m wide is surrounded by a verandah of

uniform width 4 m.Find the area of verandah.​

Answer 1

Answer:

18.(a) = (30-20)* 60

= 600

(b). (22*24)/23

=528/23

=22.96 .

19.(a) = let be ?? is = x

so, x+5=25

x=25-5

x=20

(b). 2x-40=60

2x=60+40

2x=100

x=100/2

x=50

20. a school hall in rectangular shape

which sides are 25m*15m

so, it is surrounded by rectangular verandah

so, verandah sides are = (25+4)m*(15+4)m

because of uniform width 4m

= 29*19

=551m*m