Class 3 olympiad maths

What is the speed of a train if it covers 3oo kilometer in 4 Hours?

Sagarika has 9 bracelets. She lost 1/3 of her bracelets. She purchased another 10 bracelets. How many bracelets does she have now?

What is the weight of the watermelon shown in this figure?

If water Teacher is Doctor, Doctor is Barber, Barber is Carpenter, Then who teaches us?

Study the given pictograph which shows the number of balls collected by four friends and answer the following question;
Q. How many more balls were collected by Rita than Sita?

Janvi can make 7 paper boats in 3 minutes. How many paper boats can she make in 1 hour?

If a tank can hold 120 ltr of oil and it is 1/2 filled. Then how much  more oil needs to be poured to fill the tank?

Raja puts 60 plates in the 1st Shelf, 70 plates in the 2nd shelf and 80 plates in the 3rd shelf. If this pattern continues, Then how many plates will he put in the 5th shelf?

Indra introduces Praveen as the son of the only brother of his father's wife. How is Praveen related to Indra?

Each horse is carrying a different number. If all these number are in certain a pattern, Then what is the value of " ? " in this picture?