Meena and Hari observed an animal in their garden. Hari called it an insect while Meena said it was an earthworm.

World Animal Day is celebrated on October 4.

Solution: Let the number of Rs 50 notes and Rs 100 notes be x and y respectively. According to the question, x + y = 25 ... (i) 50x + 100y = 2000 ... (ii) Multiplying equation (i) by 50, we get 50x + 50y = 1250 ... (iii) Subtracting equation (iii) from equation (ii), we get 50y = 750 y = 15 Putting...

Let the common ratio between Rahul's age Hari's age be x ∴ Age of Rahul and Hari will be 5x years and 7x years After 4 years the age of Rahul and Hari will be (5x+4) years and (7x+4) years After 4...

Given Hari age =5x given Harry age=7x 4 years later both of their age is =5x+4                                  ...

(a) Water,  Answer is correct

By planting stem-cutting of the rose plant.

The road side plants had probably some dust and soot deposited on them and thus appeared dull.

Let Meena got x and y notes of Rs. 50 and Rs100 respectively. Then x + y = 25               ...(i) 50x + 100 y = 2000 ⇒...

(i) Mendel choose garden pea for his experiments because : (a) Pea plant is small and easy to grow (b) A large number of true breeding varieties of pea plant are available. (c)...

(c) Let total number of goats be x. Then, total number of hens = (90 – x) So, x × 4 + (90 – x) × 2 = 248 4x...