Question
Find the length of BC, if ΔABC ~ ΔRQP and AC = 18 cm,
RP = 12 cm and QP = 8 cm.Solution
ΔABC ~ ΔRQP So, (AC/RP) = (BC/QP) Or, (18/12) = (BC/8) Or, (3/2) = (BC/8) Or, BC = (3/2) × 8 = 12 cm Hence, option a.
If 3 pencils cost Rs 18, how many pencils can be bought for Rs 84 (same rate)?
The ratio of the number of girls to the number of boys in a school of 720 students is 3 : 5. If 18 boys left the school, find how many new girls ...
Three numbers ‘P’, ‘Q’ and ‘R’ are such that ‘P’ is 25% more than ‘Q’ and ‘R’ is equal to the average of ‘P’ and ‘Q’. I...
There are 850 students in four houses of a school i.e. (red, white, yellow and blue) . Ratio of number of students in red house to that in blue house is...
The ratio between two numbers is 2:3. If each number is increased by 6, the ratio between then become 4:5, find the difference between numbers.
The ratio of zinc and copper in a brass pieces is 3:4. How much zinc will be there in 140 kg of such a piece?
A stone worth Rs.3800 drops and breaks with weight in the ratio 2:3:5. The price of stone is directly proportional to square of its weight. Find the tot...
What is the fourth proportional to 189, 273 and 153?
The total number of students in a school is 36580. If the ratio of boys to the girls in the school is 55:63 respectively, then find the total number of ...
‘A’, ‘B’ and ‘C’ divide a certain sum of money among themselves. The average of the amount with them is Rs. 3400. Share of ‘A’ is 25% m...
