Solve the following
(1) Shabana scored 736 marks out of 800 in her
she scored
(2) There are 500 students in the school in Dahib
swim, what percent of them can swim and wha
(3) Ir Prakash sowed jowar on 75% of the 195
sq m did he actually plant jowar?
(4) Soham received 40 messages on his birthda
TUO
Answers
Step-by-step explanation:
1. Total marks of the examination = 800
Marks scored by Shabana = 736
Suppose Shabana scored A% marks.
A/100= 736/800
A/100 ×100
736/800 × 100
A = 736 ×100/800
∴ A = 92%
∴ Shabana scored 92% marks.
2. Total number of students in the school = 500
Number of students who can swim = 350
Suppose A% students can swim
A/100= 350/ 500
A/100×100=350/500×100
A= 350×100/500
∴ A = 70%
Percentage of students who cannot swim = 100% – Percentage of students who can swim .
= 100% – 70% = 30%
∴ 70% of the students can swim and 30% cannot swim.
3. Total area of the land = 19500 sq. m.
Percentage of area in which Prakash sowed jowar = 75%
Suppose Prakash planted jowar in A sq. m.
A/ 19500= 75/100
A/19500×19500= 75/100×19500
A= 75×19500/100
A = 14,625 sq. m.
∴ Prakash planted jowar in 14,625 sq.m
4. Total messages received by Soham on his birthday = 40
Percentage of messages received for birthday greetings = 90%
Suppose Soham got A number of birthday greetings.
A/40=90/100
A/40×40= 90/100×40
A= 90×40/100
A=36
Number of messages received other than birthday greetings
= total messages received – total number of birthday greetings
= 40 – 36 = 4
∴ The number of messages received other than birthday greetings is 4.