Question

19.
(2) How many degrees is the angle which is 2 times of a right angle?
(3) Manju had a chocolate bar of 12 pieces. She gave one-fourth of it to Raji, one-third to Sugatha
and one-sixth to Sheela. She ate the remaining part. How many pieces of chocolate did each get?
(4) Sunita took some tamarind seeds. She made group of five with them and found that one seed was
left over. She tried making groups of six and groups of four. Each time one seed was left over.
What is the smallest number of seeds that Sunita had?
(5) A rectangular garden of length 50 m and breadth 40 m needs to be fenced. Find the length of
fencing required? What will be the cost of fencing at Rs. 40 per metre?​

Answer 1

Answer:

or 90+90=180 degree.........

Answer 2

Answer:

2. 2×90°= 180°

3. 1/4 part = 1/4×12 =3

1/3 part = 1/3×12 =4

1/6 part= 1/6 × 12 =2

remaining= 3

4. L.C.M. of 5, 6 and 4 = 60

so,

the smallest number of seeds Sunita had = 60+1 =61

5.length of fencing = perimeter of garden

=2(l+b)

=2 (50 +40) m

=2×90m

= 180m

Cost of fencing= Rs 40×180

=₹720