plz solve these 7,8,9 & 10 question
tomorrow is Mhh exams
it's urgent plzzz
Answers
7.
Given :
• first play time = 1 1/4 h = 5/4 h
• intermission time = 1/6 h
• evening show time = 2 1/2 h = 5/2 h
To find :
second play time = ?
Solution :
∴ second play time was
= (evening show time) - (first play time + intermission time)
= 5/2 - (5/4 + 1/6) h
= 5/2 - 5/4 - 1/6 h
= (5/2 - 5/4) - 1/6 h
= 5/4 - 1/6 h
= (15 - 2)/12 h
= 13/12 h
= 1 1/12 h (Ans.)
8.
Let, the number be x
Then,
- 1/3 of x = x/3
- 2/7 of x = 2x/7
By the given condition,
x/3 - 2x/7 = 1
⇒ (7x - 6x)/21 = 1
⇒ x/21 = 1
⇒ x = 21
∴ the required number is 21. (Ans.)
9.
Given distances :
• school to bookstore = 1 5/8 km = 13/8 km
• bookstore to grocery = 1/2 km
• grocery to home = 2 3/4 km = 11/4 km
Hence, total distance travelled cycling
= 13/8 + 1/2 + 11/4 km
= 13/8 + 4/8 + 22/8 km
= (13 + 4 + 22)/8 km
= 39/8 km
= 4 7/8 km (Ans. 1)
The total distance 4 7/8 km is less than 5 km (Ans. 2)
and it is less by
= 5 - 4 7/8 km
= (4 + 1) - (4 + 7/8) km
= 4 + 1 - 4 - 7/8
= 1 - 7/8 km
= (8 - 7)/8 km
= 1/8 km (Ans. 3)
10.
Cost of a ticket = Rs. 120 4/5 = Rs. 604/5
For students, tickets are priced at 1/4 of the normal cost Rs. 604/5,
i.e., the cost of a ticket for students is
= Rs. (1/4 of 604/5)
= Rs. (1/4 * 604/5)
= Rs. 121/5
∴ the cost of 6 tickets for students is
= Rs. (6 * 121/5)
= Rs. 726/5
= Rs. 145 1/5 (Ans.)